In 2024, among providers in related specialties within California, Dr. Mark I. Williams, MD performed more joint X-ray, and spine X-ray procedures for Medicare patients than 95% of them and he also had a list price for pelvic imaging, and thoracic (chest) imaging that was lower than the list prices billed to Medicare by 95% 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 10%

By Volume:

musculoskeletal imaging

X-rays

By Affordability:

shoulder imaging

wrist imaging

In 2024, among providers in related specialties within California, Dr. Mark I. Williams, MD performed more musculoskeletal imaging, and X-rays procedures for Medicare patients than 90% of them and he also had a list price for shoulder imaging, and wrist imaging 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:

arm X-ray

foot X-ray

tibia and fibula X-ray

wrist X-ray

By Affordability:

In 2012, among providers in related specialties within California, Dr. Mark I. Williams, MD performed more arm X-ray, foot X-ray, tibia and fibula (lower leg) X-ray, and wrist X-ray procedures for Medicare patients than 75% of them and he also had a list price for foot imaging, scanogram (bone length study), spinal procedures, and spine imaging 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 I. Williams, MD treated as a diagnostic radiologist in Bakersfield, CA during 2012 were X-rays, thoracic (chest) imaging, musculoskeletal imaging and spinal procedures.

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

abdominal imaging	34
gastrointestinal procedures	78
hip imaging	358
musculoskeletal imaging	1362
pelvic imaging	34
spinal procedures	911
thoracic (chest) imaging	2105
X-rays	4646

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Mark I. Williams, MD treated as a diagnostic radiologist in Bakersfield, CA during 2013 were X-rays, thoracic (chest) imaging, musculoskeletal imaging and spinal procedures.

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

abdominal imaging	36
gastrointestinal procedures	52
hip imaging	310
musculoskeletal imaging	1011
pelvic imaging	22
spinal procedures	538
thoracic (chest) imaging	1941
X-rays	3715

2013 Medicare Patient Data

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

**Gender**
Male	1366
Female	2183

**Ethnicity**
Non-Hispanic White	1868
Black	272
Hispanic	1184
Asian	159
Other	34
Native American	32

**Age**
From 65 to 74	1420
From 75 to 84	777
85 and over	287
Less than 65	1065

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

Hypertension	75
High Cholesterol	53
Stroke	5
Ischemic Heart Disease	44
Depression	21
Chronic Kidney Disease	23
Asthma	14
Osteoperosis	6
Atrial Fibrilation	7
Heart Failure	26
Chronic Obstructive Pulmonary Disease	27
Diabetes	45
Dementia	8
Cancer	7

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Mark I. Williams, MD treated as a diagnostic radiologist in Bakersfield, CA during 2014 were X-rays, thoracic (chest) imaging, musculoskeletal imaging and spinal procedures.

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

abdominal imaging	79
gastrointestinal procedures	54
hip imaging	302
musculoskeletal imaging	1185
pelvic imaging	45
spinal procedures	627
thoracic (chest) imaging	2553
X-rays	4626

2014 Medicare Patient Data

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

**Gender**
Male	1658
Female	2357

**Ethnicity**
Non-Hispanic White	2064
Black	268
Hispanic	1425
Asian	186
Other	39
Native American	33

**Age**
From 65 to 74	1597
From 75 to 84	930
85 and over	317
Less than 65	1171

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

Hypertension	74
High Cholesterol	55
Stroke	4
Ischemic Heart Disease	43
Depression	23
Chronic Kidney Disease	27
Asthma	14
Osteoperosis	6
Atrial Fibrilation	8
Heart Failure	25
Chronic Obstructive Pulmonary Disease	26
Diabetes	46
Dementia	9
Cancer	7

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Mark I. Williams, MD treated as a diagnostic radiologist in Bakersfield, CA during 2015 were X-rays, thoracic (chest) imaging, musculoskeletal imaging and spinal procedures.

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

abdominal imaging	37
breast procedures	16
gastrointestinal procedures	17
hip imaging	253
musculoskeletal imaging	1030
pelvic imaging	26
preventive care	16
spinal procedures	554
thoracic (chest) imaging	1869
women's imaging	16
X-rays	3601

2015 Medicare Patient Data

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

**Gender**
Male	2626
Female	4142

**Ethnicity**
Non-Hispanic White	3506
Black	440
Hispanic	2310
Asian	356
Other	66
Native American	90

**Age**
From 65 to 74	2852
From 75 to 84	1522
85 and over	560
Less than 65	1834

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

Hypertension	74
High Cholesterol	56
Stroke	6
Ischemic Heart Disease	42
Depression	23
Chronic Kidney Disease	29
Asthma	20
Osteoperosis	6
Atrial Fibrilation	8
Heart Failure	24
Chronic Obstructive Pulmonary Disease	25
Diabetes	44
Dementia	8
Cancer	7

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Mark I. Williams, MD treated as a diagnostic radiologist in Bakersfield, CA during 2016 were X-rays, thoracic (chest) imaging, musculoskeletal imaging and spinal procedures.

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

abdominal imaging	48
musculoskeletal imaging	725
pelvic imaging	12
spinal procedures	502
thoracic (chest) imaging	2075
X-rays	3408

2016 Medicare Patient Data

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

**Gender**
Male	1419
Female	2070

**Ethnicity**
Non-Hispanic White	1781
Black	253
Hispanic	1152
Asian	218
Other	47
Native American	38

**Age**
From 65 to 74	1456
From 75 to 84	742
85 and over	263
Less than 65	1028

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

Hypertension	74
High Cholesterol	55
Stroke	5
Ischemic Heart Disease	42
Depression	24
Chronic Kidney Disease	36
Asthma	32
Osteoperosis	6
Atrial Fibrilation	7
Heart Failure	24
Chronic Obstructive Pulmonary Disease	27
Diabetes	45
Dementia	10
Cancer	7

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Mark I. Williams, MD treated as a diagnostic radiologist in Bakersfield, CA during 2017 were X-rays, thoracic (chest) imaging, musculoskeletal imaging and spinal procedures.

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

musculoskeletal imaging	492
spinal procedures	378
thoracic (chest) imaging	1386
X-rays	2279

2017 Medicare Patient Data

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

**Gender**
Male	955
Female	1469

**Ethnicity**
Non-Hispanic White	1272
Black	205
Hispanic	760
Asian	118
Other	44
Native American	25

**Age**
From 65 to 74	1044
From 75 to 84	579
85 and over	175
Less than 65	626

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

Hypertension	75
High Cholesterol	52
Stroke	5
Ischemic Heart Disease	43
Depression	23
Chronic Kidney Disease	40
Asthma	15
Osteoperosis	6
Atrial Fibrilation	7
Heart Failure	26
Chronic Obstructive Pulmonary Disease	30
Diabetes	46
Dementia	9
Cancer	8

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Mark I. Williams, MD treated as a diagnostic radiologist in Bakersfield, CA during 2018 were X-rays, musculoskeletal imaging, spinal procedures and thoracic (chest) imaging.

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

musculoskeletal imaging	928
pelvic imaging	15
spinal procedures	519
thoracic (chest) imaging	75
X-rays	1570

2018 Medicare Patient Data

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

**Gender**
Male	1285
Female	2047

**Ethnicity**
Non-Hispanic White	1693
Black	263
Hispanic	1084
Asian	206
Other	53
Native American	33

**Age**
From 65 to 74	1467
From 75 to 84	785
85 and over	247
Less than 65	833

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

Hypertension	75
High Cholesterol	59
Stroke	5
Ischemic Heart Disease	41
Depression	24
Chronic Kidney Disease	38
Asthma	14
Osteoperosis	7
Atrial Fibrilation	7
Heart Failure	27
Chronic Obstructive Pulmonary Disease	26
Diabetes	45
Dementia	10
Cancer	8

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Mark I. Williams, MD treated as a diagnostic radiologist in Bakersfield, CA during 2019 were X-rays, musculoskeletal imaging, spinal procedures and thoracic (chest) imaging.

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

gastrointestinal procedures	33
musculoskeletal imaging	1368
spinal procedures	566
thoracic (chest) imaging	68
X-rays	2066

2019 Medicare Patient Data

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

**Gender**
Male	1135
Female	2149

**Ethnicity**
Non-Hispanic White	1273
Black	286
Hispanic	1433
Asian	230
Other	40
Native American	22

**Age**
From 65 to 74	1561
From 75 to 84	693
85 and over	194
Less than 65	836

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

Hypertension	75
High Cholesterol	59
Stroke	4
Ischemic Heart Disease	39
Depression	24
Chronic Kidney Disease	37
Asthma	13
Osteoperosis	11
Atrial Fibrilation	6
Heart Failure	24
Chronic Obstructive Pulmonary Disease	23
Diabetes	46
Dementia	8
Cancer	6

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Mark I. Williams, MD treated as a diagnostic radiologist in Bakersfield, CA during 2020 were X-rays, musculoskeletal imaging, spinal procedures and thoracic (chest) imaging.

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

aspiration	39
musculoskeletal imaging	1926
pelvic imaging	21
spinal procedures	721
thoracic (chest) imaging	92
X-rays	2824

2020 Medicare Patient Data

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

**Gender**
Male	1711
Female	3154

**Ethnicity**
Non-Hispanic White	2475
Black	315
Hispanic	1728
Asian	234
Other	73
Native American	40

**Age**
From 65 to 74	2502
From 75 to 84	1119
85 and over	329
Less than 65	915

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

Hypertension	74
High Cholesterol	63
Stroke	4
Ischemic Heart Disease	42
Depression	23
Chronic Kidney Disease	38
Asthma	12
Osteoperosis	12
Atrial Fibrilation	8
Heart Failure	23
Chronic Obstructive Pulmonary Disease	21
Diabetes	41
Dementia	8
Cancer	8

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Mark I. Williams, MD treated as a diagnostic radiologist in Bakersfield, CA during 2021 were X-rays, musculoskeletal imaging, spinal procedures and thoracic (chest) imaging.

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

aspiration	18
gastrointestinal procedures	46
musculoskeletal imaging	2101
pelvic imaging	23
spinal procedures	793
thoracic (chest) imaging	88
X-rays	3111

2021 Medicare Patient Data

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

**Gender**
Male	1881
Female	3435

**Ethnicity**
Non-Hispanic White	2913
Black	283
Hispanic	1757
Asian	255
Other	76
Native American	32

**Age**
From 65 to 74	2686
From 75 to 84	1346
85 and over	383
Less than 65	901

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

Hypertension	75
High Cholesterol	66
Stroke	4
Ischemic Heart Disease	43
Depression	23
Chronic Kidney Disease	37
Asthma	13
Osteoperosis	12
Atrial Fibrilation	8
Heart Failure	21
Chronic Obstructive Pulmonary Disease	20
Diabetes	41
Dementia	8
Cancer	8

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Mark I. Williams, MD treated as a diagnostic radiologist in Bakersfield, CA during 2022 were X-rays, musculoskeletal imaging, spinal procedures and thoracic (chest) imaging.

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

gastrointestinal procedures	35
musculoskeletal imaging	859
pelvic imaging	16
spinal procedures	751
thoracic (chest) imaging	96
X-rays	1798

2022 Medicare Patient Data

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

**Gender**
Male	1580
Female	2407

**Ethnicity**
Non-Hispanic White	2215
Black	212
Hispanic	1257
Asian	212
Other	73
Native American	18

**Age**
From 65 to 74	1998
From 75 to 84	1050
85 and over	328
Less than 65	611

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

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	38
Depression	21
Chronic Kidney Disease	24
Asthma	18
Osteoperosis	13
Atrial Fibrilation	15
Heart Failure	18
Chronic Obstructive Pulmonary Disease	28
Diabetes	42
Dementia	6
Cancer	12

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Mark I. Williams, MD treated as a diagnostic radiologist in Bakersfield, CA during 2023 were X-rays, musculoskeletal imaging, spinal procedures and thoracic (chest) imaging.

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

musculoskeletal imaging	1260
pelvic imaging	21
spinal procedures	865
thoracic (chest) imaging	101
X-rays	2290

2023 Medicare Patient Data

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

**Gender**
Male	1645
Female	2630

**Ethnicity**
Non-Hispanic White	2326
Black	228
Hispanic	1399
Asian	209
Other	91
Native American	22

**Age**
From 65 to 74	2112
From 75 to 84	1142
85 and over	371
Less than 65	650

Conditions of Medicare patients treated by Dr. Mark I. Williams, MD in 2023

Hypertension	75
High Cholesterol	75
Stroke	9
Ischemic Heart Disease	36
Depression	21
Chronic Kidney Disease	24
Asthma	17
Osteoperosis	15
Atrial Fibrilation	14
Heart Failure	19
Chronic Obstructive Pulmonary Disease	26
Diabetes	43
Dementia	6
Cancer	11

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Mark I. Williams, MD treated as a diagnostic radiologist in Bakersfield, CA during 2024 were X-rays, musculoskeletal imaging, spinal procedures and thoracic (chest) imaging.

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

musculoskeletal imaging	971
pelvic imaging	23
sinus imaging	14
spinal procedures	640
thoracic (chest) imaging	84
X-rays	1750

2024 Medicare Patient Data

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

**Gender**
Male	1444
Female	2115

**Ethnicity**
Non-Hispanic White	1904
Black	170
Hispanic	1183
Asian	209
Other	79
Native American	14

**Age**
From 65 to 74	1770
From 75 to 84	997
85 and over	299
Less than 65	493

Conditions of Medicare patients treated by Dr. Mark I. Williams, MD in 2024

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	37
Depression	23
Chronic Kidney Disease	24
Asthma	18
Osteoperosis	16
Atrial Fibrilation	15
Heart Failure	18
Chronic Obstructive Pulmonary Disease	26
Diabetes	43
Dementia	6
Cancer	11

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

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

The highest averages for the top procedures that Dr. Mark I. Williams, MD treated as a diagnostic radiologist in Bakersfield, CA were X-rays, musculoskeletal imaging, thoracic (chest) imaging and spinal procedures.

abdominal imaging	46
aspiration	28
breast procedures	16
gastrointestinal procedures	45
hip imaging	305
musculoskeletal imaging	1170
pelvic imaging	23
preventive care	16
sinus imaging	14
spinal procedures	643
thoracic (chest) imaging	964
women's imaging	16
X-rays	2898

Average Medicare Patient Data From 2012 - 2024

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

**Gender**
Male	1438
Female	2319

**Ethnicity**
Black / African American	245
Asian / Pacific Islander	199
Non-Hispanic White	1945
Hispanic	1282
Native American / Alaskan Native	30
Other	55

**Age**
75 to 84	898
85 and over	288
Less than 65	843
65 to 74	1728

Average of Total of Conditions of Medicare patients treated by Dr. Mark I. Williams, MD From 2012 - 2024

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

Hypertension	68
High Cholesterol	57
Stroke	5
Ischemic Heart Disease	37
Depression	21
Chronic Kidney Disease	29
Asthma	15
Osteoporosis	8
Heart Failure	21
Chronic Obstructive Pulmonary Disease	23
Diabetes	40
Atrial Fibrillation	8
Cancer	7
Dementia	7

Education & Training

He has a state license in California.

Licensed In: California

Ratings & Reviews

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General Payments

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

**Payments by Company**
Lilly USA, LLC	$94 FORTEO $16	$78
Medtronic Vascular, Inc.	$81 VenaSeal $81
Devicor Medical Products, Inc.	$47 Biopsy Site Identifiers $47
Medtronic, Inc.	$38 Abre $38

**Types of Payments**
Food and Beverage	$259

Biography

Dr. Mark Williams is a diagnostic radiology specialist in Bakersfield, CA. He attended medical school at the University of California, San Francisco (UCSF), School of Medicine. Dr. Williams trained at a hospital affiliated with Charles R. Drew University of Medicine and Science for residency. He is affiliated with Dignity Health. Dignity Health reports that he is not accepting new patients.

Select Year:

Dr. Mark I. Williams, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Mark I. Williams, MD in 2024

By Volume:

By Affordability:

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 I. 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 I. 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 I. 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 I. 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 I. 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 I. 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 I. 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 I. 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 I. 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 I. Williams, MD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark I. Williams, MD in 2023

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

2024 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark I. Williams, MD in 2024

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Average Medicare Patient Data From 2012 - 2024

Average of Total of Conditions of Medicare patients treated by Dr. Mark I. Williams, MD From 2012 - 2024

Education & Training

Ratings & Reviews

General Payments

Biography

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