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Dr. Mark Williams, MD

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Specializes in: Adult Nephrology

3885 Oakwater Circle
Orlando, FL 32806

(407) 816-5700

Dr. Mark Williams, MD is a nephrologist in Winter Park, FL specializing in adult nephrology.

Office Locations

3727 N Goldenrod Road Suite 105
Winter Park, FL 32792

(407) 657-0296

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3885 Oakwater Circle
Orlando, FL 32806

(407) 816-5700

(407) 812-6766

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In The News

“Williams, Chance Ethan, born to Diana Hook and Mark Williams, Altamonte Springs, Florida Hospital Altamonte.”—"BIRTHS", Orlando Sentinel, March 2002

Noteworthy Medicare Patient Procedures Performed by Dr. Mark Williams, MD in 2023

Click on any procedure below to see further details on volume and pricing among Medicare patients.

Top 10%

By Volume:

A1C test

By Affordability:

hemodialysis

In 2023, among providers in related specialties within Florida, Dr. Mark Williams, MD performed more A1C test procedures for Medicare patients than 90% of them and he also had a list price for hemodialysis that was lower than the list prices billed to Medicare by 90% of them. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Top 25%

By Volume:

hemodialysis

uric acid blood test

By Affordability:

A1C test

diabetes management

diabetes screening

glycated protein test

iron tests

In 2012, among providers in related specialties within Florida, Dr. Mark Williams, MD performed more hemodialysis, and uric acid blood test procedures for Medicare patients than 75% of them and he also had a list price for A1C test, diabetes management, diabetes screening, glycated protein test, and iron tests that was lower than the list prices billed to Medicare by 75% of them. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Mark Williams, MD treated as a nephrologist in Winter Park, FL during 2012 were hospital care, inpatient care and dialysis.

Volume of procedures performed by Dr. Mark Williams, MD for Medicare patients.

dialysis	470
doctor visit	827
hospital care	2510
inpatient care	2510

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Mark Williams, MD treated as a nephrologist in Winter Park, FL during 2013 were hospital care, inpatient care, dialysis and blood draw.

Volume of procedures performed by Dr. Mark Williams, MD for Medicare patients.

blood draw	32
dialysis	537
doctor visit	1003
hospital care	2338
inpatient care	2338

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Williams, MD.

**Gender**
Male	488
Female	541

**Ethnicity**
Non-Hispanic White	633
Black	98
Hispanic	249
Asian	34
Other	0
Native American	0

**Age**
From 65 to 74	293
From 75 to 84	333
85 and over	228
Less than 65	175

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2013

Hypertension	75
High Cholesterol	75
Stroke	14
Ischemic Heart Disease	69
Depression	32
Chronic Kidney Disease	75
Asthma	10
Osteoperosis	9
Atrial Fibrilation	26
Heart Failure	58
Chronic Obstructive Pulmonary Disease	31
Diabetes	64
Dementia	28
Cancer	16

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Mark Williams, MD treated as a nephrologist in Winter Park, FL during 2014 were hospital care, inpatient care, dialysis and blood draw.

Volume of procedures performed by Dr. Mark Williams, MD for Medicare patients.

blood draw	415
dialysis	520
doctor visit	1046
hospital care	2354
inpatient care	2354
lab tests	376

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Williams, MD.

**Gender**
Male	501
Female	558

**Ethnicity**
Non-Hispanic White	661
Black	101
Hispanic	250
Asian	32
Other	15
Native American	0

**Age**
From 65 to 74	301
From 75 to 84	348
85 and over	225
Less than 65	185

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2014

Hypertension	75
High Cholesterol	75
Stroke	14
Ischemic Heart Disease	67
Depression	32
Chronic Kidney Disease	75
Asthma	12
Osteoperosis	9
Atrial Fibrilation	27
Heart Failure	55
Chronic Obstructive Pulmonary Disease	29
Diabetes	62
Dementia	28
Cancer	16

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Mark Williams, MD treated as a nephrologist in Winter Park, FL during 2015 were hospital care, inpatient care, lab tests and dialysis.

Volume of procedures performed by Dr. Mark Williams, MD for Medicare patients.

blood draw	465
diabetes management	17
dialysis	701
doctor visit	951
hemofiltration	31
hospital care	2866
inpatient care	2866
lab tests	1153
preventive care	17

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Williams, MD.

**Gender**
Male	1002
Female	1054

**Ethnicity**
Non-Hispanic White	1260
Black	218
Hispanic	484
Asian	68
Other	26
Native American	0

**Age**
From 65 to 74	560
From 75 to 84	710
85 and over	420
Less than 65	366

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2015

Hypertension	75
High Cholesterol	75
Stroke	18
Ischemic Heart Disease	66
Depression	34
Chronic Kidney Disease	75
Asthma	21
Osteoperosis	7
Atrial Fibrilation	26
Heart Failure	58
Chronic Obstructive Pulmonary Disease	32
Diabetes	66
Dementia	31
Cancer	15

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Mark Williams, MD treated as a nephrologist in Winter Park, FL during 2016 were hospital care, inpatient care, lab tests and dialysis.

Volume of procedures performed by Dr. Mark Williams, MD for Medicare patients.

blood draw	496
dialysis	949
doctor visit	878
hemofiltration	20
hospital care	2717
inpatient care	2717
lab tests	1236
preventive care	14

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Williams, MD.

**Gender**
Male	469
Female	511

**Ethnicity**
Non-Hispanic White	582
Black	105
Hispanic	239
Asian	32
Other	0
Native American	0

**Age**
From 65 to 74	281
From 75 to 84	322
85 and over	195
Less than 65	182

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2016

Hypertension	75
High Cholesterol	75
Stroke	16
Ischemic Heart Disease	67
Depression	35
Chronic Kidney Disease	75
Asthma	32
Osteoperosis	8
Atrial Fibrilation	27
Heart Failure	56
Chronic Obstructive Pulmonary Disease	30
Diabetes	65
Dementia	29
Cancer	14

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Mark Williams, MD treated as a nephrologist in Winter Park, FL during 2017 were hospital care, inpatient care, lab tests and dialysis.

Volume of procedures performed by Dr. Mark Williams, MD for Medicare patients.

blood draw	506
dialysis	918
doctor visit	909
hemofiltration	25
hospital care	2309
inpatient care	2309
lab tests	1212

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Williams, MD.

**Gender**
Male	488
Female	519

**Ethnicity**
Non-Hispanic White	588
Black	117
Hispanic	250
Asian	30
Other	0
Native American	0

**Age**
From 65 to 74	304
From 75 to 84	318
85 and over	194
Less than 65	191

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2017

Hypertension	75
High Cholesterol	75
Stroke	16
Ischemic Heart Disease	69
Depression	36
Chronic Kidney Disease	75
Asthma	12
Osteoperosis	7
Atrial Fibrilation	26
Heart Failure	58
Chronic Obstructive Pulmonary Disease	28
Diabetes	65
Dementia	30
Cancer	13

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Mark Williams, MD treated as a nephrologist in Winter Park, FL during 2018 were lab tests, hospital care, inpatient care and blood draw.

Volume of procedures performed by Dr. Mark Williams, MD for Medicare patients.

blood draw	585
diabetes management	73
dialysis	569
doctor visit	862
hospital care	1756
inpatient care	1756
lab tests	2378
preventive care	106
thyroid function tests	17

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Williams, MD.

**Gender**
Male	482
Female	476

**Ethnicity**
Non-Hispanic White	573
Black	95
Hispanic	244
Asian	27
Other	0
Native American	0

**Age**
From 65 to 74	287
From 75 to 84	304
85 and over	200
Less than 65	167

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2018

Hypertension	75
High Cholesterol	75
Stroke	16
Ischemic Heart Disease	66
Depression	34
Chronic Kidney Disease	75
Asthma	11
Osteoperosis	7
Atrial Fibrilation	26
Heart Failure	57
Chronic Obstructive Pulmonary Disease	28
Diabetes	65
Dementia	29
Cancer	13

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Mark Williams, MD treated as a nephrologist in Winter Park, FL during 2019 were hospital care, inpatient care, lab tests and dialysis.

Volume of procedures performed by Dr. Mark Williams, MD for Medicare patients.

blood draw	291
diabetes management	42
dialysis	559
doctor visit	915
hemofiltration	50
hospital care	1882
inpatient care	1882
lab tests	1347
preventive care	62
thyroid function tests	20

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Williams, MD.

**Gender**
Male	461
Female	479

**Ethnicity**
Non-Hispanic White	589
Black	88
Hispanic	214
Asian	30
Other	0
Native American	0

**Age**
From 65 to 74	286
From 75 to 84	296
85 and over	206
Less than 65	152

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2019

Hypertension	75
High Cholesterol	75
Stroke	15
Ischemic Heart Disease	65
Depression	38
Chronic Kidney Disease	75
Asthma	12
Osteoperosis	8
Atrial Fibrilation	28
Heart Failure	56
Chronic Obstructive Pulmonary Disease	29
Diabetes	62
Dementia	31
Cancer	16

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Mark Williams, MD treated as a nephrologist in Winter Park, FL during 2020 were hospital care, inpatient care, lab tests and dialysis.

Volume of procedures performed by Dr. Mark Williams, MD for Medicare patients.

blood draw	275
dialysis	792
doctor visit	641
hemofiltration	111
hospital care	2028
inpatient care	2028
lab tests	1435
preventive care	16

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Williams, MD.

**Gender**
Male	467
Female	480

**Ethnicity**
Non-Hispanic White	580
Black	103
Hispanic	204
Asian	29
Other	0
Native American	0

**Age**
From 65 to 74	299
From 75 to 84	284
85 and over	197
Less than 65	167

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2020

Hypertension	75
High Cholesterol	75
Stroke	17
Ischemic Heart Disease	67
Depression	38
Chronic Kidney Disease	75
Asthma	11
Osteoperosis	6
Atrial Fibrilation	28
Heart Failure	57
Chronic Obstructive Pulmonary Disease	29
Diabetes	61
Dementia	33
Cancer	17

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Mark Williams, MD treated as a nephrologist in Winter Park, FL during 2021 were lab tests, hospital care, inpatient care and dialysis.

Volume of procedures performed by Dr. Mark Williams, MD for Medicare patients.

blood draw	299
diabetes management	97
dialysis	628
doctor visit	509
hemofiltration	165
hospital care	1599
inpatient care	1599
lab tests	1618
preventive care	127

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Williams, MD.

**Gender**
Male	403
Female	386

**Ethnicity**
Non-Hispanic White	476
Black	89
Hispanic	179
Asian	26
Other	0
Native American	0

**Age**
From 65 to 74	250
From 75 to 84	242
85 and over	167
Less than 65	130

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2021

Hypertension	75
High Cholesterol	75
Stroke	16
Ischemic Heart Disease	65
Depression	36
Chronic Kidney Disease	75
Asthma	10
Osteoperosis	9
Atrial Fibrilation	26
Heart Failure	58
Chronic Obstructive Pulmonary Disease	26
Diabetes	63
Dementia	30
Cancer	16

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Mark Williams, MD treated as a nephrologist in Winter Park, FL during 2022 were hospital care, inpatient care, lab tests and dialysis.

Volume of procedures performed by Dr. Mark Williams, MD for Medicare patients.

blood draw	264
diabetes management	94
dialysis	518
doctor visit	471
hemofiltration	109
hospital care	1569
inpatient care	1569
lab tests	1446
preventive care	116

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Williams, MD.

**Gender**
Male	374
Female	359

**Ethnicity**
Non-Hispanic White	457
Black	71
Hispanic	151
Asian	0
Other	29
Native American	0

**Age**
From 65 to 74	214
From 75 to 84	243
85 and over	151
Less than 65	125

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	24
Ischemic Heart Disease	58
Depression	37
Chronic Kidney Disease	75
Asthma	14
Osteoperosis	12
Atrial Fibrilation	36
Heart Failure	53
Chronic Obstructive Pulmonary Disease	28
Diabetes	66
Dementia	21
Cancer	21

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Mark Williams, MD for Medicare patients.

The highest averages for the top procedures that Dr. Mark Williams, MD treated as a nephrologist in Winter Park, FL were hospital care, inpatient care, lab tests and dialysis.

blood draw	362
diabetes management	64
dialysis	651
doctor visit	819
hemofiltration	73
hospital care	2175
inpatient care	2175
lab tests	1355
preventive care	65
thyroid function tests	18

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Mark Williams, MD.

**Gender**
Male	466
Female	487

**Ethnicity**
Black / African American	98
Asian / Pacific Islander	28
Non-Hispanic White	581
Hispanic	224
Native American / Alaskan Native	0
Other	6

**Age**
75 to 84	309
85 and over	198
Less than 65	167
65 to 74	279

Average of Total of Conditions of Medicare patients treated by Dr. Mark Williams, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Mark Williams, MD treated were chronic kidney disease, high cholesterol, hypertension and ischemic heart disease.

Hypertension	68
High Cholesterol	68
Stroke	15
Ischemic Heart Disease	59
Depression	32
Chronic Kidney Disease	68
Asthma	13
Osteoporosis	7
Heart Failure	51
Chronic Obstructive Pulmonary Disease	26
Diabetes	58
Atrial Fibrillation	25
Cancer	14
Dementia	26

Education & Training

He has a state license in Florida.

Licensed In: Florida

Ratings & Reviews

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General Payments

These charts describe general payments received by Dr. Mark Williams, MD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
AstraZeneca Pharmaceuticals LP	$649 LOKELMA $570	FARXIGA $65	$14
Otsuka America Pharmaceutical, Inc.	$268 JYNARQUE $158	SAMSCA $85	$25
Bayer HealthCare Pharmaceuticals Inc.	$219 Kerendia $219
Horizon Therapeutics plc	$173 KRYSTEXXA $173
OPKO Pharmaceuticals, LLC	$173 Rayaldee $173
Other	$1,321 Abre $162	VELTASSA $149	System One $144	ACTHAR $122	ZEPATIER $111	Other $632

**Types of Payments**
Food and Beverage	$2,684
Education	$120

Biography

Dr. Mark Williams specializes in adult nephrology and practices in Orlando, FL and Winter Park, FL. Dr. Williams obtained a license to practice in Florida.

Select Year:

Dr. Mark Williams, MD

Office Locations

In The News

Noteworthy Medicare Patient Procedures Performed by Dr. Mark Williams, MD in 2023

By Volume:

By Affordability:

By Volume:

By Affordability:

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

2013 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Williams, MD in 2022

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Average Medicare Patient Data From 2012 - 2022

Average of Total of Conditions of Medicare patients treated by Dr. Mark Williams, MD From 2012 - 2022

Education & Training

Ratings & Reviews

General Payments

Biography

Other Providers in Winter Park, FL