Active NPI 1962486332 Individual Practitioner Male Practitioner

Dr. Mark Stephen Singer , MD

Internal Medicine • Napa, CA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Mark Singer, MD is a certified Internal Medicine practicing in Napa, CA. With approximately 43 years of clinical experience since graduating from University Of California, Geffen School Of Medicine in 1983, Dr. Singer delivers high-quality medical care to the local community at 3334 STERLING CT.

Dr. Singer accepts Medicare assignment.

Frequently performed procedures and clinical services include residence visit for established patient with moderate level of medical decision making, per day, if using time, at least, subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least, initial nursing facility visit. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

3334 Sterling Ct

Napa, CA 945584262

Telephone 7073655151

Fax 7072524887

Medicare Profile & Education

Medical School

University Of California, Geffen School Of Medicine

Graduation Year

1983

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Napa, CA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

43 Yrs +12.5 yrs vs City Avg

City Avg: 30.5 Yrs

State Avg: 26.6 Yrs

Regional Practice Density

62 Specialists

Practicing in Napa, CA (18502 Statewide)

Telehealth Adoption Rate

14.5% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

11.5% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Singer (43 Years) 43 Yrs

Napa Specialty Average (30.5 Years) 30.5 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
99349 Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes	462	68	$153.00	$138.10
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	176	69	$89.38	$81.89
99306 Initial nursing facility visit, typically 45 minutes per day	119	114	$225.00	$197.07
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	88	53	$98.00	$96.45
99497 Advance care planning, first 30 minutes	62	60	$100.00	$90.28
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	53	53	$155.00	$147.37
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes	42	31	$170.00	$167.03
99350 Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes	20	19	$250.00	$200.37
99345 Residence visit for new patient with high level of medical decision making, per day, if using time, at least 75 minutes	18	18	$250.00	$218.97
36410 Insertion of needle into vein, patient 3 years or older	17	12	$25.00	$20.60
99348 Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes	17	11	$125.00	$82.90
90662 Influenza vaccine split virus, preservative free	15	15	$84.00	$81.82
G0008 Administration of influenza virus vaccine	14	14	$35.00	$34.30

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99349 Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes	436	62	$152.97	$137.56
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	247	67	$80.00	$78.78
99306 Initial nursing facility visit, typically 45 minutes per day	121	115	$225.00	$196.45
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	58	34	$98.00	$96.43
99497 Advance care planning, first 30 minutes	41	39	$100.00	$90.31
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	40	40	$155.00	$144.68
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes	34	25	$170.00	$166.34
17110 Destruction of up to 14 skin growths	26	13	$150.00	$137.11
99348 Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes	18	13	$125.00	$82.26
G0008 Administration of influenza virus vaccine	17	17	$32.00	$31.36
90662 Influenza vaccine split virus, preservative free	17	17	$75.00	$71.93
99345 Residence visit for new patient with high level of medical decision making, per day, if using time, at least 75 minutes	12	12	$250.00	$218.79

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	308	84	$80.00	$74.08
99336 Established patient assisted living visit, typically 40 minutes	304	50	$150.00	$144.35
99349 Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes	131	22	$150.00	$137.27
99306 Initial nursing facility visit, typically 45 minutes per day	102	96	$225.00	$175.76
99497 Advance care planning, first 30 minutes	50	47	$100.00	$91.62
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	46	46	$155.00	$145.20
17110 Destruction of up to 14 skin growths	30	15	$150.00	$132.31
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	28	22	$98.00	$96.57
36410 Insertion of needle into vein, patient 3 years or older	25	16	$25.00	$20.11
90662 Influenza vaccine split virus, preservative free	17	17	$69.82	$68.35
99328 New patient custodial care facility, group care, or assisted living visit, typically 75 minutes	14	14	$250.00	$229.73

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99336 Established patient assisted living visit, typically 40 minutes	395	59	$162.99	$146.32
99349 Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes	166	20	$161.69	$140.35
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	79	29	$90.38	$74.92
99497 Advance care planning, first 30 minutes	51	49	$176.47	$93.20
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	48	48	$193.44	$148.37
G0181 Physician or allowed practitioner supervision of a patient receiving medicare-covered services provided by a participating home health agency (patient not present) requiring complex and multidisciplinary care modalities involving regular physician or allow	47	22	$150.00	$116.46
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	44	29	$150.00	$59.77
G0182 Physician supervision of a patient under a medicare-approved hospice (patient not present) requiring complex and multidisciplinary care modalities involving regular physician development and/or revision of care plans, review of subsequent reports of patien	41	13	$225.00	$118.17
99306 Initial nursing facility visit, typically 45 minutes per day	41	39	$229.27	$179.27
36410 Insertion of needle into vein, patient 3 years or older	29	23	$25.00	$20.20
17110 Destruction of up to 14 skin growths	26	15	$150.00	$136.36
90662 Influenza vaccine split virus, preservative free	25	25	$37.56	$37.42
G0008 Administration of influenza virus vaccine	24	24	$37.00	$19.68
99335 Established patient assisted living visit, typically 25 minutes	13	11	$138.85	$103.58
99328 New patient custodial care facility, group care, or assisted living visit, typically 75 minutes	11	11	$254.55	$235.12

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99336 Established patient assisted living visit, typically 40 minutes	620	73	$165.00	$148.88
99349 Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes	125	18	$164.00	$142.96
G0182 Physician supervision of a patient under a medicare-approved hospice (patient not present) requiring complex and multidisciplinary care modalities involving regular physician development and/or revision of care plans, review of subsequent reports of patien	106	23	$225.00	$120.43
99497 Advance care planning, first 30 minutes	78	71	$150.00	$94.50
J3420 Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg	70	11	$15.00	$1.99
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	69	11	$40.00	$16.25
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	67	12	$100.00	$76.67
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	62	36	$150.00	$60.78
G0181 Physician or allowed practitioner supervision of a patient receiving medicare-covered services provided by a participating home health agency (patient not present) requiring complex and multidisciplinary care modalities involving regular physician or allow	61	26	$150.00	$119.59
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	60	60	$200.00	$131.60
99335 Established patient assisted living visit, typically 25 minutes	35	25	$140.00	$105.40
99487 Complex chronic care management services for two or more chronic conditions, first 60 minutes of clinical staff time directed by health care professional, per calendar month	30	14	$250.00	$104.84
99328 New patient custodial care facility, group care, or assisted living visit, typically 75 minutes	20	20	$255.00	$240.71
17110 Destruction of up to 14 skin growths	20	17	$150.00	$135.21
36410 Insertion of needle into vein, patient 3 years or older	16	16	$25.00	$20.09
99496 Transitional care management services for problem of high complexity	13	12	$275.38	$270.14

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99336 Established patient assisted living visit, typically 40 minutes	653	68	$165.00	$148.74
99487 Complex chronic care management services for two or more chronic conditions, first 60 minutes of clinical staff time directed by health care professional, per calendar month	123	24	$250.00	$107.11
G0181 Physician or allowed practitioner supervision of a patient receiving medicare-covered services provided by a participating home health agency (patient not present) requiring complex and multidisciplinary care modalities involving regular physician or allow	82	34	$150.00	$120.40
G0182 Physician supervision of a patient under a medicare-approved hospice (patient not present) requiring complex and multidisciplinary care modalities involving regular physician development and/or revision of care plans, review of subsequent reports of patien	79	20	$225.00	$120.84
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	68	68	$200.00	$133.00
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	61	13	$100.00	$76.39
G0179 Physician re-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 to affirm the initial imp	60	21	$125.00	$47.87
99497 Advance care planning, first 30 minutes	50	50	$150.00	$93.89
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	48	14	$40.00	$19.55
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	44	30	$150.00	$60.92
90756 Vaccine for influenza for injection into muscle	25	25	$85.00	$26.13
17110 Destruction of up to 14 skin growths	24	13	$150.00	$133.03
99335 Established patient assisted living visit, typically 25 minutes	22	17	$140.00	$104.70
36410 Insertion of needle into vein, patient 3 years or older	18	14	$25.00	$20.01
99328 New patient custodial care facility, group care, or assisted living visit, typically 75 minutes	11	11	$255.00	$240.54

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99336 Established patient assisted living visit, typically 40 minutes	476	71	$165.00	$148.29
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	126	52	$150.00	$121.76
99349 Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes	75	31	$164.00	$141.05
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	64	64	$200.00	$133.22
G0008 Administration of influenza virus vaccine	55	55	$37.00	$24.22
G0182 Physician supervision of a patient under a medicare-approved hospice (patient not present) requiring complex and multidisciplinary care modalities involving regular physician development and/or revision of care plans, review of subsequent reports of patien	52	16	$225.00	$121.17
90662 Influenza vaccine split virus, preservative free	52	52	$55.00	$52.30
99497 Advance care planning, first 30 minutes	49	46	$150.00	$92.84
36410 Insertion of needle into vein, patient 3 years or older	48	31	$25.00	$19.54
G0181 Physician or allowed practitioner supervision of a patient receiving medicare-covered services provided by a participating home health agency (patient not present) requiring complex and multidisciplinary care modalities involving regular physician or allow	44	21	$150.00	$120.43
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	31	$150.00	$61.48
99487 Complex chronic care management services for two or more chronic conditions, first 60 minutes of clinical staff time directed by health care professional, per calendar month	39	18	$250.00	$108.20
17110 Destruction of up to 14 skin growths	25	13	$150.00	$134.06
99335 Established patient assisted living visit, typically 25 minutes	18	13	$140.00	$103.88
99328 New patient custodial care facility, group care, or assisted living visit, typically 75 minutes	14	14	$255.00	$238.55
99496 Transitional care management services for problem of high complexity	13	12	$275.00	$264.99
99483 Assessment of and care planning for patient with impaired thought processing, typically 50 minutes	13	12	$350.00	$269.32

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99336 Established patient assisted living visit, typically 40 minutes	600	73	$165.00	$148.14
99349 Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes	334	47	$164.00	$140.61
99497 Advance care planning, first 30 minutes	114	107	$150.00	$89.76
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	94	94	$200.00	$132.27
G0008 Administration of influenza virus vaccine	76	74	$37.00	$30.62
90662 Influenza vaccine split virus, preservative free	72	71	$55.00	$48.05
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	59	36	$150.17	$61.78
36410 Insertion of needle into vein, patient 3 years or older	51	22	$25.00	$19.55
G0181 Physician or allowed practitioner supervision of a patient receiving medicare-covered services provided by a participating home health agency (patient not present) requiring complex and multidisciplinary care modalities involving regular physician or allow	39	16	$150.00	$120.46
G0182 Physician supervision of a patient under a medicare-approved hospice (patient not present) requiring complex and multidisciplinary care modalities involving regular physician development and/or revision of care plans, review of subsequent reports of patien	39	16	$225.00	$121.79
17110 Destruction of up to 14 skin growths	32	14	$150.00	$133.18
99358 Prolonged patient service without direct patient contact first hour	31	26	$150.00	$121.76
99496 Transitional care management services for problem of high complexity	25	20	$275.00	$264.27
99495 Transitional care management services for problem of at least moderate complexity	12	11	$250.00	$187.32
99328 New patient custodial care facility, group care, or assisted living visit, typically 75 minutes	11	11	$255.00	$238.18

Medical Specialties & State Licenses

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License CA G53924

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.

Emergency Medicine

NUCC Taxonomy Code: 207P00000X

State License CA CAG539243

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

Additional State Medicaid & Healthcare Payer Identifiers

Commercial Insurance / Payer ID State License

CAG539243 (CA)

Practice Associates & Co-Workers

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

1 Associated Practitioners

Lindsey Canavesio , ACNP

Nurse Practitioner - Acute Care

NPI 1710396825

Career & Practice History Timeline

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

6 Historical Events

✅

NPI Profile Active July 12, 2010

NPI status registered as active in NPPES database

📍

Updated Practice Location July 12, 2010

Registered at 3334 STERLING CT, NAPA, CA 945584262 (Tel: 7073655151)

📍

Updated Business Mailing Address July 12, 2010

Registered at 3334 STERLING CT, NAPA, CA 945584262 (Tel: 7073655151)

👤

Provider Name / Credentials Updated July 12, 2010

Recorded as MARK SINGER, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 12, 2010

Emergency Medicine (License #CAG539243 in CA)

🟢

Initial NPI Registration & Enumeration November 30, 2005

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

0 Reviews

No patient reviews submitted yet for Dr. Mark Singer. Be the first to share your experience!

Only verified registered users can submit ratings, post feedback, and upload facility photos.

NPI Administrative Meta

NPI Number: 1962486332

Entity Type:

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

Enumeration Date: November 30, 2005

Last Update: July 12, 2010

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

3334 Sterling Ct

Napa, CA 945584262

Phone: 7073655151

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.