Active NPI 1770558702 Individual Practitioner Male Practitioner

Dr. Mark Williams , MD

Internal Medicine - Nephrology • Winter Park, FL

Professional Overview & Biography Verified Profile Summary

Dr. Mark Williams, MD is a registered healthcare professional specializing in Internal Medicine - Nephrology in Winter Park, FL. Practice services are available at 3727 N GOLDENROD RD STE 105 under active NPI credentials.

Frequently performed procedures and clinical services include established patient outpatient office visit, subsequent hospital care with moderate levelof medical decision making, if using time, at least, hemodialysis procedure with physician evaluation. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

3727 N Goldenrod Rd Ste 105

Winter Park, FL 327928611

Telephone 4076570296

Associated Practice Facility / Clinic

🏢 Internal Medicine Specialists, Pa Facility NPI 1770583528

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine - Nephrology in Winter Park, FL

Active Practitioner

Practitioner Clinical Experience

Active

City Avg: 21.3 Yrs

State Avg: 28.0 Yrs

Regional Practice Density

7 Specialists

Practicing in Winter Park, FL (865 Statewide)

Telehealth Adoption Rate

28.6% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

60.1% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2023)

Reporting Year:

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	424	216	$200.00	$116.71
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	351	171	$205.00	$118.20
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	214	86	$140.00	$78.57
90935 Hemodialysis procedure with physician evaluation	214	74	$133.00	$70.80
36415 Insertion of needle into vein for collection of blood sample	125	86	$20.00	$8.40
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	104	92	$450.00	$172.26
80053 Blood test, comprehensive group of blood chemicals	90	75	$47.00	$10.35
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	89	72	$26.00	$7.61
82570 Creatinine level to test for kidney function or muscle injury	85	70	$20.00	$5.08
84156 Total protein level, urine	84	70	$15.00	$3.60
90960 Dialysis services, 4 or more physician visits per month (20 years or older)	82	25	$1200.00	$346.65
84550 Uric acid level, blood	79	68	$12.00	$4.43
83036 Hemoglobin A1C level	49	41	$35.00	$9.52
82728 Ferritin (blood protein) level	42	35	$38.00	$13.36
83550 Iron binding capacity	42	35	$25.00	$8.57
83540 Iron level	42	35	$18.00	$6.34
99443 Telephone medical discussion with physician, 21-30 minutes	34	32	$200.00	$101.47
99213 Established patient office or other outpatient visit, typically 15 minutes	27	26	$135.00	$88.35
83970 Parathormone (parathyroid hormone) level	16	13	$115.00	$40.45

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	1,015	363	$205.00	$101.82
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	428	220	$200.00	$107.40
90935 Hemodialysis procedure with physician evaluation	409	120	$133.00	$72.70
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	336	130	$140.00	$71.21
36415 Insertion of needle into vein for collection of blood sample	264	117	$20.00	$2.96
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	218	182	$450.00	$198.33
80053 Blood test, comprehensive group of blood chemicals	209	107	$47.00	$10.43
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	205	107	$26.00	$7.68
90960 Dialysis services, 4 or more physician visits per month (20 years or older)	192	39	$1200.00	$358.93
82570 Creatinine level to test for kidney function or muscle injury	191	101	$20.00	$5.12
84156 Total protein level, urine	190	101	$15.00	$3.63
84550 Uric acid level, blood	169	95	$12.00	$4.46
90945 Dialysis procedure including 1 evaluation	109	24	$138.00	$86.30
99443 Telephone medical discussion with physician, 21-30 minutes	97	59	$200.00	$78.73
83036 Hemoglobin A1C level	94	56	$35.00	$9.59
82728 Ferritin (blood protein) level	79	56	$38.00	$13.48
83550 Iron binding capacity	79	56	$25.00	$8.64
83540 Iron level	79	56	$18.00	$6.40
83970 Parathormone (parathyroid hormone) level	48	38	$115.00	$40.78
90961 Dialysis services, 2-3 physician visits per month (20 years or older)	41	26	$900.00	$297.05
84100 Phosphate level	39	25	$25.00	$4.68
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	29	29	$395.00	$222.24
82306 Vitamin d-3 level	29	22	$85.00	$29.26
80061 Blood test, lipids (cholesterol and triglycerides)	22	15	$71.00	$13.24
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	14	11	$275.00	$179.97
82550 Creatine kinase (cardiac enzyme) level, total	13	13	$18.00	$6.44

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	1,124	400	$205.00	$104.58
90935 Hemodialysis procedure with physician evaluation	463	128	$133.00	$74.15
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	459	241	$200.00	$129.84
36415 Insertion of needle into vein for collection of blood sample	299	136	$20.00	$3.00
90960 Dialysis services, 4 or more physician visits per month (20 years or older)	286	52	$1200.00	$365.31
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	243	196	$450.00	$202.89
80053 Blood test, comprehensive group of blood chemicals	239	118	$47.00	$10.56
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	237	119	$26.00	$7.77
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	232	87	$140.00	$72.82
84156 Total protein level, urine	219	109	$15.00	$3.67
82570 Creatinine level to test for kidney function or muscle injury	219	109	$20.00	$5.18
84550 Uric acid level, blood	191	105	$12.00	$4.52
90945 Dialysis procedure including 1 evaluation	165	24	$138.00	$87.41
99443 Telephone medical discussion with physician, 21-30 minutes	142	90	$200.00	$127.04
83036 Hemoglobin A1C level	97	56	$35.00	$9.71
83550 Iron binding capacity	83	52	$25.00	$8.74
83540 Iron level	83	52	$18.00	$6.47
82728 Ferritin (blood protein) level	83	52	$38.00	$13.63
83970 Parathormone (parathyroid hormone) level	49	39	$115.00	$41.28
84100 Phosphate level	42	23	$25.00	$4.74
90961 Dialysis services, 2-3 physician visits per month (20 years or older)	33	22	$900.00	$301.90
82306 Vitamin d-3 level	31	22	$85.00	$29.60
80061 Blood test, lipids (cholesterol and triglycerides)	30	15	$71.00	$13.39
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	26	11	$275.00	$183.10
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	24	11	$41.00	$14.09
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	24	24	$395.00	$225.43
82550 Creatine kinase (cardiac enzyme) level, total	15	15	$18.00	$6.51

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	1,433	490	$205.00	$106.84
J0885 Injection, epoetin alfa, (for non-esrd use), 1000 units	700	12	$19.00	$9.82
90935 Hemodialysis procedure with physician evaluation	681	160	$133.00	$75.89
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	586	308	$200.00	$108.14
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	323	249	$450.00	$207.48
90960 Dialysis services, 4 or more physician visits per month (20 years or older)	299	61	$1200.00	$290.42
36415 Insertion of needle into vein for collection of blood sample	275	148	$20.00	$2.98
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	272	98	$140.00	$74.37
80053 Blood test, comprehensive group of blood chemicals	218	126	$47.00	$10.50
82570 Creatinine level to test for kidney function or muscle injury	217	125	$20.00	$5.13
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	216	124	$26.00	$7.69
84156 Total protein level, urine	201	117	$15.00	$3.63
84550 Uric acid level, blood	182	111	$12.00	$4.47
99443 Telephone medical discussion with physician, 21-30 minutes	150	119	$200.00	$109.25
90945 Dialysis procedure including 1 evaluation	111	18	$138.00	$88.62
82728 Ferritin (blood protein) level	83	51	$38.00	$13.56
83550 Iron binding capacity	82	51	$25.00	$8.70
83540 Iron level	82	51	$18.00	$6.44
90961 Dialysis services, 2-3 physician visits per month (20 years or older)	51	35	$900.00	$242.01
83970 Parathormone (parathyroid hormone) level	44	37	$115.00	$40.79
82306 Vitamin d-3 level	33	21	$85.00	$29.46
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	32	32	$395.00	$212.05
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	28	15	$41.00	$14.28
84100 Phosphate level	24	21	$25.00	$4.72
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	23	12	$275.00	$142.70
82550 Creatine kinase (cardiac enzyme) level, total	19	19	$18.00	$6.45
82043 Urine microalbumin (protein) level	18	16	$15.00	$5.69
80061 Blood test, lipids (cholesterol and triglycerides)	16	13	$71.00	$13.31

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	1,236	426	$205.00	$105.58
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	823	386	$200.00	$107.56
J0885 Injection, epoetin alfa, (for non-esrd use), 1000 units	710	16	$19.00	$11.24
90935 Hemodialysis procedure with physician evaluation	509	146	$133.17	$74.42
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	333	139	$140.00	$73.54
90960 Dialysis services, 4 or more physician visits per month (20 years or older)	324	54	$1200.00	$287.15
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	313	243	$450.00	$204.89
36415 Insertion of needle into vein for collection of blood sample	291	179	$20.00	$2.94
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	235	161	$26.00	$8.44
80053 Blood test, comprehensive group of blood chemicals	234	162	$47.00	$11.51
82570 Creatinine level to test for kidney function or muscle injury	215	149	$20.00	$5.60
84156 Total protein level, urine	209	146	$15.00	$3.99
84550 Uric acid level, blood	99	87	$12.00	$4.92
90961 Dialysis services, 2-3 physician visits per month (20 years or older)	62	38	$900.00	$232.22
82728 Ferritin (blood protein) level	53	39	$38.00	$14.85
83540 Iron level	53	39	$18.00	$7.05
83550 Iron binding capacity	52	38	$25.00	$9.52
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	50	38	$275.00	$131.36
90945 Dialysis procedure including 1 evaluation	50	23	$138.00	$86.90
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	42	42	$395.00	$200.79
83036 Hemoglobin A1C level	42	36	$35.00	$10.57
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	35	17	$41.00	$16.54
83970 Parathormone (parathyroid hormone) level	28	27	$115.00	$44.94
84443 Blood test, thyroid stimulating hormone (TSH)	20	17	$47.00	$18.30
80061 Blood test, lipids (cholesterol and triglycerides)	20	16	$71.00	$14.58
82607 Cyanocobalamin (vitamin B-12) level	17	16	$42.00	$16.41
84100 Phosphate level	17	16	$25.00	$5.16
82746 Folic acid level	15	14	$41.00	$16.01
82043 Urine microalbumin (protein) level	14	12	$15.00	$6.29
82306 Vitamin d-3 level	12	11	$85.00	$32.23
83735 Magnesium level	12	12	$19.00	$7.29

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	895	382	$205.00	$104.53
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	760	365	$200.00	$105.44
36415 Insertion of needle into vein for collection of blood sample	585	271	$20.00	$2.93
90935 Hemodialysis procedure with physician evaluation	569	154	$133.00	$73.30
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	506	211	$140.00	$72.51
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	429	221	$26.00	$9.34
90960 Dialysis services, 4 or more physician visits per month (20 years or older)	420	64	$1200.00	$283.19
80053 Blood test, comprehensive group of blood chemicals	413	219	$47.00	$12.78
84156 Total protein level, urine	400	214	$15.00	$4.42
82570 Creatinine level to test for kidney function or muscle injury	397	214	$20.00	$6.26
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	320	239	$450.00	$203.85
84550 Uric acid level, blood	179	140	$12.00	$5.41
83970 Parathormone (parathyroid hormone) level	78	63	$115.00	$49.55
83540 Iron level	73	48	$18.00	$7.83
82728 Ferritin (blood protein) level	73	48	$38.00	$16.49
83036 Hemoglobin A1C level	73	54	$35.00	$11.75
83550 Iron binding capacity	73	48	$25.00	$10.57
90961 Dialysis services, 2-3 physician visits per month (20 years or older)	58	40	$900.00	$238.19
84100 Phosphate level	41	35	$25.00	$5.59
82306 Vitamin d-3 level	40	39	$85.00	$35.82
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	35	11	$41.00	$19.99
99231 Follow-up hospital inpatient care per day, typically 15 minutes	35	26	$80.00	$39.62
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	33	27	$275.00	$133.57
80061 Blood test, lipids (cholesterol and triglycerides)	33	27	$71.00	$16.20
99213 Established patient office or other outpatient visit, typically 15 minutes	29	28	$135.00	$70.03
83735 Magnesium level	24	22	$19.00	$8.10
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	22	22	$395.00	$199.29
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	18	18	$315.00	$156.20
80048 Blood test, basic group of blood chemicals (calcium, total)	18	15	$37.00	$10.23
82043 Urine microalbumin (protein) level	17	17	$15.00	$7.00
84443 Blood test, thyroid stimulating hormone (TSH)	17	14	$47.00	$20.33

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	929	434	$205.00	$104.59
90935 Hemodialysis procedure with physician evaluation	893	192	$133.00	$72.25
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	766	314	$140.00	$72.25
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	704	353	$200.11	$104.54
36415 Insertion of needle into vein for collection of blood sample	506	252	$20.00	$2.93
J0885 Injection, epoetin alfa, (for non-esrd use), 1000 units	410	12	$19.00	$12.85
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	405	284	$445.56	$203.38
90960 Dialysis services, 4 or more physician visits per month (20 years or older)	398	78	$1200.00	$281.82
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	262	154	$26.00	$10.41
80053 Blood test, comprehensive group of blood chemicals	259	154	$47.00	$12.77
84156 Total protein level, urine	248	150	$15.00	$4.91
82570 Creatinine level to test for kidney function or muscle injury	244	147	$20.00	$6.93
99231 Follow-up hospital inpatient care per day, typically 15 minutes	209	79	$80.00	$39.46
99213 Established patient office or other outpatient visit, typically 15 minutes	140	124	$135.00	$71.31
84550 Uric acid level, blood	93	77	$12.00	$2.78
90961 Dialysis services, 2-3 physician visits per month (20 years or older)	82	52	$900.00	$232.53
90966 Home dialysis services per month, patient 20 years of age or older	57	11	$900.00	$236.04
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	32	26	$275.00	$138.46
90945 Dialysis procedure including 1 evaluation	25	11	$138.00	$85.33
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	22	12	$41.00	$24.73
83540 Iron level	21	16	$18.00	$8.70
82728 Ferritin (blood protein) level	21	16	$38.00	$18.33
83550 Iron binding capacity	21	16	$25.00	$11.75
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	20	20	$395.00	$206.00
84100 Phosphate level	16	15	$25.00	$4.49
83735 Magnesium level	14	11	$19.00	$9.01
82306 Vitamin d-3 level	13	12	$85.00	$39.80
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	13	13	$315.00	$163.15

Medical Specialties & State Licenses

CMS Verified: 2022-11-07

Internal Medicine - Nephrology Primary Specialty

NUCC Taxonomy Code: 207RN0300X

State License FL ME54570

An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

061510200 (FL)

Commercial Insurance / Payer ID Aetna

0624921 (FL)

Commercial Insurance / Payer ID Bc/bs

08545 (FL)

Commercial Insurance / Payer ID United Healthcare

3100042 (FL)

Secondary Practice Locations

3885 Oakwater Cir

Orlando, FL 328066257

Phone: 4078165700

Practice Associates & Co-Workers

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

1 Associated Practitioners

Dr. Chidambaram Valliappan , MD

Internal Medicine - Nephrology

NPI 1265815021

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 Practice Location November 07, 2022

Registered at 3727 N GOLDENROD RD STE 105, WINTER PARK, FL 327928611 (Tel: 4076570296)

✅

NPI Profile Active September 30, 2009

NPI status registered as active in NPPES database

📍

Updated Practice Location September 30, 2009

Registered at 3885 OAKWATER CIR, ORLANDO, FL 328066257 (Tel: 4078515600)

📍

Updated Business Mailing Address September 30, 2009

Registered at 3885 OAKWATER CIR, ORLANDO, FL 328066257 (Tel: 4078515600)

👤

Provider Name / Credentials Updated September 30, 2009

Recorded as MARK WILLIAMS, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) September 30, 2009

Internal Medicine (License #ME54570 in FL)

🟢

Initial NPI Registration & Enumeration February 22, 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: 1770558702

Entity Type:

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

Enumeration Date: February 22, 2006

Last Update: November 07, 2022

Sole Proprietor: No

Update or Correct Profile

Mailing Address

3885 Oakwater Cir

Orlando, FL 328066257

Phone: 4078165700

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.