Active NPI 1629154539 Individual Practitioner Male Practitioner

Dr. Mark Alan Parkhurst , MD

Internal Medicine • Silver Spring, MD

✓ Accepts Medicare Assignment Telehealth Available

Professional Overview & Biography Verified Profile Summary

Dr. Mark Parkhurst, MD is a certified Internal Medicine practicing in Silver Spring, MD. With approximately 47 years of clinical experience since graduating from University Of Maryland School Of Medicine in 1979, Dr. Parkhurst delivers high-quality medical care to the local community at 3110 GRACEFIELD RD.

Dr. Parkhurst is affiliated with Erickson Health Medical Group Of Maryland, Pc and accepts Medicare assignment . Telehealth and virtual consultation options are available for eligible patients.

Frequently performed procedures and clinical services include admn sarscov2 vacc 1 dose, sarscv2 vac 30mcg trs-suc im, visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

3110 Gracefield Rd

Silver Spring, MD 209041820

Telephone 3015728340

Fax 3015728403

Associated Practice Facility / Clinic

🏢 Erickson Health Medical Group Of Maryland Pc Facility NPI 1205856549

Medicare Profile & Education

Medical School

University Of Maryland School Of Medicine

Graduation Year

1979

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

Telehealth Services Available

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Silver Spring, MD

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

47 Yrs +19.1 yrs vs City Avg

City Avg: 27.9 Yrs

State Avg: 28.1 Yrs

Regional Practice Density

196 Specialists

Practicing in Silver Spring, MD (4114 Statewide)

Telehealth Adoption Rate

20.4% Regional Adoption

✓ Offers Virtual Consultations

Medicare Pricing Discount

9.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Parkhurst (47 Years) 47 Yrs

Silver Spring Specialty Average (27.9 Years) 27.9 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
90480 Admn sarscov2 vacc 1 dose	1,038	1,019	$40.00	$39.20
91320 Sarscv2 vac 30mcg trs-suc im	1,038	1,019	$153.05	$149.99
G2211 Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's	1,014	395	$17.88	$16.74
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	713	307	$143.58	$95.02
99213 Established patient office or other outpatient visit, typically 15 minutes	419	247	$102.01	$81.66
G0008 Administration of influenza virus vaccine	372	372	$33.00	$32.34
90662 Influenza vaccine split virus, preservative free	372	372	$83.46	$81.79
G0444 Annual depression screening, 5 to 15 minutes	170	170	$21.42	$19.62
G0442 Annual alcohol misuse screening, 5 to 15 minutes	170	170	$21.42	$19.62
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	147	147	$146.05	$133.75
99442 Telephone medical discussion with physician, 11-20 minutes	129	107	$100.64	$83.47
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	103	70	$81.77	$76.31
M0201 Administration of pneumococcal, influenza, hepatitis b, and/or covid-19 vaccine inside a patient's home; reported only once per individual home per date of service when such vaccine administration(s) are performed at the patient's home	97	97	$38.00	$37.24
87635 Amplifed dna or rna probe detection of severe acute respiratory syndrome coronavirus 2 (covid-19) antigen	88	72	$51.31	$50.28
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	79	67	$60.63	$56.65
85610 Blood test, clotting time	67	13	$4.29	$4.20
81002 Urinalysis, manual test	54	44	$4.00	$3.41
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	39	26	$63.88	$66.88
99306 Initial nursing facility visit, typically 45 minutes per day	39	38	$198.48	$185.24
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	38	25	$26.91	$49.94
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	32	26	$118.46	$110.73
99496 Transitional care management services for problem of high complexity	31	29	$315.08	$293.98
99347 Residence visit for established patient with straightforward medical decision making, per day, if using time, at least 15 minutes	31	15	$49.35	$46.24
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	30	24	$81.54	$77.24
99348 Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes	29	20	$83.33	$78.27
G0009 Administration of pneumococcal vaccine	28	28	$33.14	$32.48
90677 Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use	28	28	$288.68	$282.89
69209 Removal of impacted ear wax by washing	23	20	$18.99	$17.82
99441 Telephone medical discussion with physician, 5-10 minutes	23	23	$65.95	$66.89
93000 Routine ekg using at least 12 leads including interpretation and report	21	20	$16.21	$15.17
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	18	18	$200.65	$117.64
87502 Detection test by nucleic acid for multiple types influenza virus	18	18	$95.80	$93.88
99495 Transitional care management services for problem of at least moderate complexity	16	15	$232.58	$216.91
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	14	11	$118.22	$111.39
99443 Telephone medical discussion with physician, 21-30 minutes	14	13	$141.67	$102.04
81003 Automated urinalysis test	13	13	$2.25	$2.20

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	697	350	$103.35	$78.64
90480 Admn sarscov2 vacc 1 dose	482	482	$47.13	$46.19
91320 Sarscv2 vac 30mcg trs-suc im	482	482	$131.10	$128.48
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	453	243	$145.71	$109.21
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	165	165	$147.76	$144.80
G0008 Administration of influenza virus vaccine	134	134	$35.34	$34.63
90662 Influenza vaccine split virus, preservative free	134	134	$73.40	$71.93
G0442 Annual alcohol misuse screening, 5 to 15 minutes	122	122	$19.58	$19.19
99442 Telephone medical discussion with physician, 11-20 minutes	113	98	$106.69	$80.35
87635 Amplifed dna or rna probe detection of severe acute respiratory syndrome coronavirus 2 (covid-19) antigen	112	97	$51.31	$50.28
G0444 Annual depression screening, 5 to 15 minutes	101	101	$19.58	$19.19
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	89	66	$83.60	$82.30
99347 Residence visit for established patient with straightforward medical decision making, per day, if using time, at least 15 minutes	86	53	$49.51	$48.82
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	85	41	$83.60	$82.42
85610 Blood test, clotting time	75	14	$4.29	$4.20
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	71	56	$60.20	$59.28
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	57	30	$65.40	$48.65
81002 Urinalysis, manual test	39	30	$3.99	$3.41
99348 Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes	32	16	$84.58	$83.44
99496 Transitional care management services for problem of high complexity	32	29	$318.72	$312.58
69209 Removal of impacted ear wax by washing	31	25	$18.93	$18.65
99306 Initial nursing facility visit, typically 45 minutes per day	27	27	$202.72	$199.48
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	27	23	$119.38	$117.67
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	26	23	$27.43	$19.73
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	23	21	$203.57	$145.96
99305 Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes	22	21	$148.81	$146.43
93000 Routine ekg using at least 12 leads including interpretation and report	22	22	$16.79	$16.52
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	18	18	$249.67	$245.90
87502 Detection test by nucleic acid for multiple types influenza virus	17	17	$95.80	$93.88
G0009 Administration of pneumococcal vaccine	16	16	$32.19	$31.55
90677 Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use	16	16	$283.91	$278.14
99441 Telephone medical discussion with physician, 5-10 minutes	13	13	$65.95	$49.42
99495 Transitional care management services for problem of at least moderate complexity	12	11	$236.75	$230.77
G0506 Comprehensive assessment of and care planning for patients requiring chronic care management services (list separately in addition to primary monthly care management service)	11	11	$70.66	$69.53
99497 Advance care planning, first 30 minutes	11	11	$92.82	$91.43
0124A Fee covid-19 vac 13 res	11	11	$46.71	$45.78

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	616	306	$148.55	$123.91
99213 Established patient office or other outpatient visit, typically 15 minutes	590	318	$105.79	$88.19
G0008 Administration of influenza virus vaccine	534	532	$29.98	$29.38
90662 Influenza vaccine split virus, preservative free	533	531	$69.94	$68.54
G0444 Annual depression screening, 5 to 15 minutes	208	208	$19.58	$19.31
G0442 Annual alcohol misuse screening, 5 to 15 minutes	195	195	$19.58	$19.32
99334 Established patient custodial care facility, group care, or assisted living visit, typically 15 minutes	170	110	$68.25	$67.69
0124A Fee covid-19 vac 13 res	170	170	$40.00	$39.20
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	157	157	$151.95	$150.43
99442 Telephone medical discussion with physician, 11-20 minutes	154	113	$106.69	$88.13
87635 Amplifed dna or rna probe detection of severe acute respiratory syndrome coronavirus 2 (covid-19) antigen	109	97	$53.00	$50.62
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	101	72	$77.99	$77.22
81002 Urinalysis, manual test	82	58	$3.48	$3.44
99335 Established patient assisted living visit, typically 25 minutes	79	39	$106.99	$106.06
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	75	25	$77.99	$77.20
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	66	55	$62.18	$61.60
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	62	51	$27.97	$23.33
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	62	54	$209.06	$183.17
85610 Blood test, clotting time	59	13	$4.29	$4.25
99347 Residence visit for established patient with straightforward medical decision making, per day, if using time, at least 15 minutes	43	42	$61.38	$60.90
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	42	29	$66.74	$55.99
99348 Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes	34	32	$93.01	$92.14
G0506 Comprehensive assessment of and care planning for patients requiring chronic care management services (list separately in addition to primary monthly care management service)	33	33	$72.08	$71.23
69209 Removal of impacted ear wax by washing	31	25	$19.27	$19.11
99496 Transitional care management services for problem of high complexity	31	30	$324.79	$320.85
99443 Telephone medical discussion with physician, 21-30 minutes	30	27	$150.70	$127.98
93000 Routine ekg using at least 12 leads including interpretation and report	28	27	$16.93	$16.75
99306 Initial nursing facility visit, typically 45 minutes per day	26	25	$184.73	$182.85
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	23	23	$255.77	$250.46
0054A Intramuscular administration of single severe acute respiratory syndrome coronavirus 2 (covid-19) vaccine, mrna-lnp, spike protein, preservative free, 30 mcg/0.3ml dosage, tris-sucrose formulation; booster dose	18	18	$40.00	$39.56
99441 Telephone medical discussion with physician, 5-10 minutes	17	15	$65.95	$56.60
99305 Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes	16	16	$144.17	$142.66
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	15	14	$102.50	$101.35
G0009 Administration of pneumococcal vaccine	15	15	$30.00	$29.80
87502 Detection test by nucleic acid for multiple types influenza virus	11	11	$95.80	$93.88
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	11	11	$193.70	$191.16

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	743	329	$150.02	$141.06
99213 Established patient office or other outpatient visit, typically 15 minutes	500	266	$106.13	$99.25
0002A Intramuscular administration of single severe acute respiratory syndrome coronavirus 2 (covid-19) vaccine, mrna-lnp, spike protein, preservative free, 30 mcg/0.3ml dosage, diluent reconstituted; second dose	499	499	$28.39	$28.39
99334 Established patient custodial care facility, group care, or assisted living visit, typically 15 minutes	336	162	$67.53	$67.24
G0008 Administration of influenza virus vaccine	245	245	$19.45	$19.45
90662 Influenza vaccine split virus, preservative free	245	245	$65.05	$65.05
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	142	100	$78.21	$78.21
G0444 Annual depression screening, 5 to 15 minutes	121	121	$19.58	$19.58
87635 Amplifed dna or rna probe detection of severe acute respiratory syndrome coronavirus 2 (covid-19) antigen	115	107	$53.00	$51.31
85610 Blood test, clotting time	94	19	$4.29	$4.29
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	92	57	$27.34	$25.62
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	81	81	$153.25	$153.25
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	79	33	$78.23	$78.21
99442 Telephone medical discussion with physician, 11-20 minutes	74	60	$106.16	$98.39
99335 Established patient assisted living visit, typically 25 minutes	70	23	$107.46	$107.45
99443 Telephone medical discussion with physician, 21-30 minutes	66	53	$146.92	$138.67
81002 Urinalysis, manual test	62	51	$3.48	$3.48
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	60	54	$61.83	$61.83
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	52	46	$209.06	$199.64
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	51	48	$65.95	$61.39
99347 Residence visit for established patient with straightforward medical decision making, per day, if using time, at least 15 minutes	37	35	$61.46	$61.46
93000 Routine ekg using at least 12 leads including interpretation and report	28	26	$17.51	$17.51
99496 Transitional care management services for problem of high complexity	28	26	$324.44	$324.44
99306 Initial nursing facility visit, typically 45 minutes per day	28	27	$186.69	$186.69
G0442 Annual alcohol misuse screening, 5 to 15 minutes	26	26	$19.58	$19.58
81003 Automated urinalysis test	24	22	$2.25	$2.25
69209 Removal of impacted ear wax by washing	23	22	$19.01	$19.00
G0506 Comprehensive assessment of and care planning for patients requiring chronic care management services (list separately in addition to primary monthly care management service)	17	17	$70.91	$70.91
0004A Fee covid-19 vac 1 res	16	16	$40.00	$40.00
99348 Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes	15	15	$93.78	$93.78
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	15	14	$102.92	$102.92
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	13	13	$255.71	$255.71
G0009 Administration of pneumococcal vaccine	12	12	$24.20	$19.86
99495 Transitional care management services for problem of at least moderate complexity	12	11	$239.73	$239.73
99358 Prolonged patient service without direct patient contact first hour	11	11	$124.98	$124.98

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	942	383	$125.75	$126.24
G0008 Administration of influenza virus vaccine	320	319	$19.45	$19.45
90662 Influenza vaccine split virus, preservative free	320	319	$60.96	$60.96
99443 Telephone medical discussion with physician, 21-30 minutes	286	181	$124.30	$125.19
99213 Established patient office or other outpatient visit, typically 15 minutes	232	147	$87.12	$87.70
G0442 Annual alcohol misuse screening, 5 to 15 minutes	199	199	$19.58	$19.83
99442 Telephone medical discussion with physician, 11-20 minutes	174	121	$86.52	$87.29
99334 Established patient custodial care facility, group care, or assisted living visit, typically 15 minutes	157	134	$68.39	$69.08
85610 Blood test, clotting time	146	16	$4.29	$4.26
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	105	76	$27.55	$27.74
G0444 Annual depression screening, 5 to 15 minutes	103	103	$19.58	$19.83
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	102	50	$78.89	$79.17
99335 Established patient assisted living visit, typically 25 minutes	98	48	$108.04	$108.53
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	96	96	$134.08	$134.68
99307 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes	95	37	$50.02	$50.61
93793 Anticoagulant management of patient taking warfarin	91	13	$13.44	$13.51
G0506 Comprehensive assessment of and care planning for patients requiring chronic care management services (list separately in addition to primary monthly care management service)	78	78	$72.28	$72.57
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	76	71	$168.31	$169.14
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	68	60	$62.04	$62.41
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	61	49	$78.89	$79.25
81002 Urinalysis, manual test	61	50	$3.48	$3.45
87635 Amplifed dna or rna probe detection of severe acute respiratory syndrome coronavirus 2 (covid-19) antigen	42	41	$53.00	$51.21
99496 Transitional care management services for problem of high complexity	38	34	$283.87	$283.85
69209 Removal of impacted ear wax by washing	36	28	$17.65	$17.77
99305 Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes	28	27	$146.51	$146.73
81003 Automated urinalysis test	28	26	$2.34	$2.24
93000 Routine ekg using at least 12 leads including interpretation and report	23	23	$20.14	$20.23
99358 Prolonged patient service without direct patient contact first hour	21	21	$126.03	$126.57
99307 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes	20	19	$50.02	$50.59
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	20	16	$53.53	$53.85
99497 Advance care planning, first 30 minutes	19	18	$97.07	$88.91
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	16	13	$103.81	$104.23
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	16	16	$238.67	$239.15
36415 Insertion of needle into vein for collection of blood sample	16	16	$3.00	$2.97
G0009 Administration of pneumococcal vaccine	15	15	$24.20	$19.32
99441 Telephone medical discussion with physician, 5-10 minutes	11	11	$50.25	$50.73
99495 Transitional care management services for problem of at least moderate complexity	11	11	$214.75	$215.66

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	1,241	453	$143.11	$123.69
85610 Blood test, clotting time	152	25	$5.03	$4.28
G0506 Comprehensive assessment of and care planning for patients requiring chronic care management services (list separately in addition to primary monthly care management service)	135	135	$82.27	$71.10
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	124	75	$30.80	$26.63
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	123	106	$190.82	$165.15
90662 Influenza vaccine split virus, preservative free	118	118	$64.32	$54.89
G0008 Administration of influenza virus vaccine	118	118	$22.51	$19.06
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	114	114	$154.09	$132.90
99213 Established patient office or other outpatient visit, typically 15 minutes	108	88	$98.11	$84.79
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	107	91	$89.38	$77.22
G0444 Annual depression screening, 5 to 15 minutes	92	92	$19.58	$19.42
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	83	38	$89.38	$77.28
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	80	26	$60.17	$52.08
99335 Established patient assisted living visit, typically 25 minutes	78	41	$122.69	$106.04
99497 Advance care planning, first 30 minutes	61	60	$110.15	$87.82
G0442 Annual alcohol misuse screening, 5 to 15 minutes	56	56	$19.58	$19.42
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	56	48	$70.59	$61.00
99496 Transitional care management services for problem of high complexity	51	48	$305.85	$264.22
93793 Anticoagulant management of patient taking warfarin	50	15	$15.81	$13.66
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	48	11	$22.37	$19.33
81002 Urinalysis, manual test	45	34	$4.00	$3.41
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	42	34	$118.83	$102.73
93000 Routine ekg using at least 12 leads including interpretation and report	35	33	$22.90	$19.79
99336 Established patient assisted living visit, typically 40 minutes	34	23	$174.86	$151.15
99305 Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes	34	34	$168.07	$145.19
99306 Initial nursing facility visit, typically 45 minutes per day	31	30	$214.88	$185.64
69209 Removal of impacted ear wax by washing	29	25	$20.00	$17.29
81003 Automated urinalysis test	27	25	$2.86	$2.44
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	25	25	$270.26	$233.49
99358 Prolonged patient service without direct patient contact first hour	14	13	$143.74	$124.24
99495 Transitional care management services for problem of at least moderate complexity	13	13	$217.04	$187.50
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes	13	13	$175.56	$151.71
G0009 Administration of pneumococcal vaccine	11	11	$27.83	$19.06

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	1,299	476	$141.90	$118.01
G0008 Administration of influenza virus vaccine	259	257	$34.73	$23.72
90662 Influenza vaccine split virus, preservative free	259	257	$61.27	$52.23
85610 Blood test, clotting time	224	31	$5.68	$4.75
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	213	38	$58.73	$48.83
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	168	97	$29.05	$24.31
99213 Established patient office or other outpatient visit, typically 15 minutes	127	106	$96.51	$80.19
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	107	92	$190.12	$158.54
G0506 Comprehensive assessment of and care planning for patients requiring chronic care management services (list separately in addition to primary monthly care management service)	99	99	$83.67	$69.47
36415 Insertion of needle into vein for collection of blood sample	97	87	$3.59	$2.94
G0442 Annual alcohol misuse screening, 5 to 15 minutes	92	92	$24.57	$20.48
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	72	62	$90.25	$74.95
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	72	31	$89.33	$74.87
G0444 Annual depression screening, 5 to 15 minutes	71	71	$24.26	$20.07
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	66	66	$155.42	$128.48
81003 Automated urinalysis test	64	47	$3.31	$2.71
99335 Established patient assisted living visit, typically 25 minutes	56	36	$121.02	$101.59
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	49	41	$122.69	$99.08
99496 Transitional care management services for problem of high complexity	45	40	$308.02	$255.64
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	45	40	$71.51	$59.34
99306 Initial nursing facility visit, typically 45 minutes per day	43	42	$215.61	$178.97
99336 Established patient assisted living visit, typically 40 minutes	40	31	$174.93	$145.89
99495 Transitional care management services for problem of at least moderate complexity	38	34	$217.80	$180.80
99497 Advance care planning, first 30 minutes	30	30	$109.53	$84.69
99497 Advance care planning, first 30 minutes	30	30	$109.12	$90.87
81002 Urinalysis, manual test	25	24	$4.00	$3.41
99305 Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes	25	25	$168.63	$140.15
69209 Removal of impacted ear wax by washing	25	22	$19.98	$16.58
93000 Routine ekg using at least 12 leads including interpretation and report	21	20	$22.86	$18.97
99358 Prolonged patient service without direct patient contact first hour	21	20	$144.08	$119.59
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	17	14	$123.23	$99.35
99490 Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month	15	14	$55.42	$45.99
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes	14	14	$176.67	$147.08
G0009 Administration of pneumococcal vaccine	12	12	$34.73	$23.72
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	11	11	$271.39	$225.63

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	1,298	475	$136.20	$121.04
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	261	81	$56.54	$49.77
85610 Blood test, clotting time	245	36	$6.71	$5.27
G0008 Administration of influenza virus vaccine	230	230	$34.67	$29.60
90662 Influenza vaccine split virus, preservative free	230	230	$56.22	$47.97
99213 Established patient office or other outpatient visit, typically 15 minutes	209	156	$93.02	$82.42
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	114	75	$25.72	$23.38
81003 Automated urinalysis test	97	72	$4.47	$3.02
G0444 Annual depression screening, 5 to 15 minutes	73	73	$23.09	$20.64
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	71	65	$85.23	$76.75
99495 Transitional care management services for problem of at least moderate complexity	66	64	$209.97	$183.98
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	64	57	$185.78	$162.51
99336 Established patient assisted living visit, typically 40 minutes	58	33	$168.88	$149.04
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	55	52	$129.67	$101.43
G0009 Administration of pneumococcal vaccine	53	52	$31.61	$29.43
90670 Pneumococcal vaccine for injection into muscle	48	48	$207.31	$181.22
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	43	40	$70.96	$61.11
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	42	22	$84.94	$76.88
99335 Established patient assisted living visit, typically 25 minutes	41	24	$117.77	$104.93
99305 Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes	39	36	$162.57	$143.92
36415 Insertion of needle into vein for collection of blood sample	31	26	$3.97	$2.94
93005 Routine electrocardiogram (ecg) using at least 12 leads with tracing	30	28	$11.86	$10.24
G0442 Annual alcohol misuse screening, 5 to 15 minutes	27	27	$24.22	$20.64
69210 Removal of impacted ear wax	26	24	$63.40	$55.93
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	24	15	$127.82	$101.65
99496 Transitional care management services for problem of high complexity	20	20	$295.06	$261.14
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes	20	19	$173.88	$150.75
99306 Initial nursing facility visit, typically 45 minutes per day	19	19	$207.56	$183.91
99490 Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month	17	17	$49.39	$47.73
81002 Urinalysis, manual test	11	11	$4.99	$3.43

Medical Specialties & State Licenses

CMS Verified: 2026-08-04

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License MD D0024093

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

008203102 (MD)

Medicaid State Provider ID

156221500 (MD)

Commercial Insurance / Payer ID Bcbs-Md

345660-04

Commercial Insurance / Payer ID Evercare

04-13565

Commercial Insurance / Payer ID Tricare North

52-2096682

Commercial Insurance / Payer ID Carefirst Bcbs

0055

Commercial Insurance / Payer ID Carefirst Bcbs Of Dc

9680-0031

Commercial Insurance / Payer ID Carefirst Bcbs Of Md

0943SE-345660-05

Commercial Insurance / Payer ID Carefirst Bcbs Of Md

0943ER-345660-05

Commercial Insurance / Payer ID Bcbs

345660-04 (MD)

Hospital & Practice Group Affiliations

Erickson Health Medical Group Of Maryland, Pc

3110 Gracefield Rd, Silver Spring, MD 209041820

Phone: 3015728340

Erickson Health Medical Group Of Maryland, Pc

7051 Rockledge Dr, Bethesda, MD 208171680

Phone: 3012729830

Secondary Practice Locations

7051 Rockledge Dr

Bethesda, MD 208171680

Phone: 3012729830

711 Maiden Choice Ln

Catonsville, MD 212283632

Phone: 4102475602

8800 Walther Blvd

Parkville, MD 212349001

Phone: 4108823240

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

24 Associated Practitioners

Dr. Michael Westerman , MD

Internal Medicine - Geriatric Medicine

NPI 1013929181

Doctor of Medicine (M.D.)

Kenderlate Arthus , NP-BC

Nurse Practitioner

NPI 1043980550

NPBC

Erica Greenspan , LICSW, LCSW-C

Social Worker - Clinical

NPI 1083120455

Licensed Independent Clinical Social Worker, Licensed Clinical Social Worker - Certified

Nicole Christenson , CRNP-FAMILY

Nurse Practitioner - Family

NPI 1104155167

CRNPFAMILY

Dr. Lauren Sweetser , MD

Internal Medicine

NPI 1154528396

Doctor of Medicine (M.D.)

Dr. Loveen Puthumana , MD

Internal Medicine - Geriatric Medicine

NPI 1235175043

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

7 Historical Events

📍

Updated Business Mailing Address March 15, 2022

Registered at 5730 EXECUTIVE DR STE 230, CATONSVILLE, MD 212281762 (Tel: 4104022379)

✅

NPI Profile Active December 10, 2014

NPI status registered as active in NPPES database

📍

Updated Practice Location December 10, 2014

Registered at 3110 GRACEFIELD RD, SILVER SPRING, MD 209041820 (Tel: 3015728340)

📍

Updated Business Mailing Address December 10, 2014

Registered at 5525 RESEARCH PARK DR FL 4, BALTIMORE, MD 212284873 (Tel: 3013841503)

👤

Provider Name / Credentials Updated December 10, 2014

Recorded as MARK PARKHURST, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) December 10, 2014

Internal Medicine (License #D0024093 in MD)

🟢

Initial NPI Registration & Enumeration October 31, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

0 Reviews

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NPI Administrative Meta

NPI Number: 1629154539

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: October 31, 2006

Last Update: August 04, 2026

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

5730 Executive Dr Ste 230

Catonsville, MD 212281762

Phone: 3015728340

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.