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Dr. Clay Hughes Napper, MD

(No ratings)

Specializes in: Diagnostic Radiology

Wake Forest University School of Medicine

1720 El Camino Real Suite 118
Burlingame, CA 94010

(650) 696-7850

Dr. Clay Hughes Napper, MD is a diagnostic radiologist in San Mateo, CA specializing in diagnostic radiology. He graduated from Wake Forest University School of Medicine. Dr. Clay Hughes Napper, MD is affiliated with Sutter Health.

Office Locations

Sutter Health

100 South San Mateo Drive
San Mateo, CA 94401

(650) 696-5515

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1501 Trousdale Drive
Burlingame, CA 94010

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1720 El Camino Real Suite 118
Burlingame, CA 94010

(650) 696-7850

(650) 696-3677

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222 W 39th Avenue
San Mateo, CA 94403

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935 El Camino Real
South San Francisco, CA 94080

(650) 873-1050

(650) 873-2174

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Noteworthy Medicare Patient Procedures Performed by Dr. Clay Hughes Napper, MD in 2023

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

Top 10%

By Affordability:

brain MRI

breast imaging

complete abdominal ultrasound

mammogram

MRI

In 2023, Dr. Clay Hughes Napper, MD had a list price for brain MRI, breast imaging, complete abdominal ultrasound, mammogram (breast X-ray), and MRI (magnetic resonance imaging) that was lower than the list prices billed to Medicare by 90% of providers in related specialties within California. 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 Affordability:

bone density test

central DEXA

dual-energy X-ray absorptiometry

limited abdominal ultrasound

neck ultrasound

peripheral DEXA

screening mammogram

soft tissue ultrasound

spine imaging

testicular ultrasound without Doppler

transabdominal ultrasound

women's imaging

In 2012, Dr. Clay Hughes Napper, MD had a list price for bone density test, central DEXA, dual-energy X-ray absorptiometry (DEXA), limited abdominal ultrasound, neck ultrasound, peripheral DEXA, screening mammogram, soft tissue ultrasound, spine imaging, testicular ultrasound without Doppler, transabdominal ultrasound, and women's imaging that was lower than the list prices billed to Medicare by 75% of providers in related specialties within California. 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. Clay Hughes Napper, MD treated as a diagnostic radiologist in San Mateo, CA during 2012 were X-rays, thoracic (chest) imaging, CT scan and abdominal imaging.

Volume of procedures performed by Dr. Clay Hughes Napper, MD for Medicare patients.

abdominal imaging	335
brain imaging (neuroimaging)	169
breast procedures	24
CT scan	582
hip imaging	50
MRI (magnetic resonance imaging)	12
musculoskeletal imaging	66
neck imaging	17
pelvic imaging	299
preventive care	24
spinal procedures	37
thoracic (chest) imaging	641
ultrasound (sonogram)	100
women's imaging	39
X-rays	657

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Clay Hughes Napper, MD treated as a diagnostic radiologist in San Mateo, CA during 2013 were X-rays, CT scan, thoracic (chest) imaging and abdominal imaging.

Volume of procedures performed by Dr. Clay Hughes Napper, MD for Medicare patients.

abdominal imaging	438
brain imaging (neuroimaging)	214
breast procedures	66
CT scan	698
hip imaging	40
musculoskeletal imaging	70
neck imaging	31
pelvic imaging	389
preventive care	66
spinal procedures	32
thoracic (chest) imaging	636
ultrasound (sonogram)	178
women's imaging	92
X-rays	733

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Clay Hughes Napper, MD.

**Gender**
Male	703
Female	890

**Ethnicity**
Non-Hispanic White	1179
Black	0
Hispanic	156
Asian	176
Other	49
Native American	0

**Age**
From 65 to 74	563
From 75 to 84	511
85 and over	398
Less than 65	121

Conditions of Medicare patients treated by Dr. Clay Hughes Napper, MD in 2013

Hypertension	75
High Cholesterol	62
Stroke	11
Ischemic Heart Disease	37
Depression	21
Chronic Kidney Disease	35
Asthma	13
Osteoperosis	13
Atrial Fibrilation	20
Heart Failure	30
Chronic Obstructive Pulmonary Disease	18
Diabetes	32
Dementia	15
Cancer	22

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Clay Hughes Napper, MD treated as a diagnostic radiologist in San Mateo, CA during 2014 were X-rays, thoracic (chest) imaging, CT scan and abdominal imaging.

Volume of procedures performed by Dr. Clay Hughes Napper, MD for Medicare patients.

abdominal imaging	439
brain imaging (neuroimaging)	242
breast procedures	26
CT scan	751
hip imaging	34
MRI (magnetic resonance imaging)	11
musculoskeletal imaging	67
neck imaging	38
pelvic imaging	352
preventive care	26
spinal procedures	45
thoracic (chest) imaging	781
ultrasound (sonogram)	167
women's imaging	39
X-rays	807

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Clay Hughes Napper, MD.

**Gender**
Male	650
Female	954

**Ethnicity**
Non-Hispanic White	1184
Black	0
Hispanic	163
Asian	171
Other	48
Native American	0

**Age**
From 65 to 74	554
From 75 to 84	525
85 and over	427
Less than 65	98

Conditions of Medicare patients treated by Dr. Clay Hughes Napper, MD in 2014

Hypertension	74
High Cholesterol	64
Stroke	11
Ischemic Heart Disease	34
Depression	22
Chronic Kidney Disease	35
Asthma	13
Osteoperosis	13
Atrial Fibrilation	20
Heart Failure	30
Chronic Obstructive Pulmonary Disease	18
Diabetes	33
Dementia	17
Cancer	22

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Clay Hughes Napper, MD treated as a diagnostic radiologist in San Mateo, CA during 2015 were X-rays, thoracic (chest) imaging, CT scan and abdominal imaging.

Volume of procedures performed by Dr. Clay Hughes Napper, MD for Medicare patients.

abdominal imaging	401
brain imaging (neuroimaging)	194
breast procedures	27
CT scan	670
hip imaging	43
musculoskeletal imaging	99
neck imaging	24
pelvic imaging	350
preventive care	27
spinal procedures	52
thoracic (chest) imaging	808
ultrasound (sonogram)	186
women's imaging	50
X-rays	849

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Clay Hughes Napper, MD.

**Gender**
Male	1428
Female	1914

**Ethnicity**
Non-Hispanic White	2448
Black	86
Hispanic	336
Asian	380
Other	0
Native American	0

**Age**
From 65 to 74	1164
From 75 to 84	1104
85 and over	812
Less than 65	262

Conditions of Medicare patients treated by Dr. Clay Hughes Napper, MD in 2015

Hypertension	74
High Cholesterol	63
Stroke	9
Ischemic Heart Disease	33
Depression	22
Chronic Kidney Disease	37
Asthma	18
Osteoperosis	13
Atrial Fibrilation	20
Heart Failure	29
Chronic Obstructive Pulmonary Disease	18
Diabetes	30
Dementia	14
Cancer	19

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Clay Hughes Napper, MD treated as a diagnostic radiologist in San Mateo, CA during 2016 were X-rays, thoracic (chest) imaging, CT scan and abdominal imaging.

Volume of procedures performed by Dr. Clay Hughes Napper, MD for Medicare patients.

abdominal imaging	426
brain imaging (neuroimaging)	183
breast procedures	23
CT scan	656
musculoskeletal imaging	141
neck imaging	42
pelvic imaging	330
preventive care	23
spinal procedures	48
thoracic (chest) imaging	894
ultrasound (sonogram)	226
women's imaging	50
X-rays	974

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Clay Hughes Napper, MD.

**Gender**
Male	816
Female	1110

**Ethnicity**
Non-Hispanic White	1417
Black	0
Hispanic	165
Asian	231
Other	60
Native American	0

**Age**
From 65 to 74	713
From 75 to 84	603
85 and over	492
Less than 65	118

Conditions of Medicare patients treated by Dr. Clay Hughes Napper, MD in 2016

Hypertension	74
High Cholesterol	60
Stroke	9
Ischemic Heart Disease	34
Depression	21
Chronic Kidney Disease	39
Asthma	21
Osteoperosis	14
Atrial Fibrilation	19
Heart Failure	27
Chronic Obstructive Pulmonary Disease	18
Diabetes	29
Dementia	16
Cancer	20

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Clay Hughes Napper, MD treated as a diagnostic radiologist in San Mateo, CA during 2017 were X-rays, thoracic (chest) imaging, CT scan and abdominal imaging.

Volume of procedures performed by Dr. Clay Hughes Napper, MD for Medicare patients.

abdominal imaging	354
brain imaging (neuroimaging)	159
breast procedures	23
CT scan	602
MRI (magnetic resonance imaging)	12
musculoskeletal imaging	130
neck imaging	40
pelvic imaging	281
preventive care	23
spinal procedures	36
thoracic (chest) imaging	742
ultrasound (sonogram)	160
women's imaging	39
X-rays	743

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Clay Hughes Napper, MD.

**Gender**
Male	739
Female	980

**Ethnicity**
Non-Hispanic White	1200
Black	0
Hispanic	175
Asian	217
Other	83
Native American	0

**Age**
From 65 to 74	681
From 75 to 84	571
85 and over	354
Less than 65	113

Conditions of Medicare patients treated by Dr. Clay Hughes Napper, MD in 2017

Hypertension	72
High Cholesterol	54
Stroke	7
Ischemic Heart Disease	34
Depression	21
Chronic Kidney Disease	41
Asthma	13
Osteoperosis	15
Atrial Fibrilation	17
Heart Failure	26
Chronic Obstructive Pulmonary Disease	18
Diabetes	31
Dementia	15
Cancer	19

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Clay Hughes Napper, MD treated as a diagnostic radiologist in San Mateo, CA during 2018 were CT scan, abdominal imaging, pelvic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. Clay Hughes Napper, MD for Medicare patients.

abdominal imaging	359
brain imaging (neuroimaging)	156
breast procedures	31
CT scan	593
musculoskeletal imaging	101
neck imaging	50
nuclear scan	11
pelvic imaging	296
preventive care	31
spinal procedures	38
thoracic (chest) imaging	148
ultrasound (sonogram)	191
women's imaging	47
X-rays	163

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Clay Hughes Napper, MD.

**Gender**
Male	628
Female	910

**Ethnicity**
Non-Hispanic White	1059
Black	0
Hispanic	171
Asian	209
Other	66
Native American	0

**Age**
From 65 to 74	629
From 75 to 84	499
85 and over	314
Less than 65	96

Conditions of Medicare patients treated by Dr. Clay Hughes Napper, MD in 2018

Hypertension	72
High Cholesterol	63
Stroke	7
Ischemic Heart Disease	31
Depression	23
Chronic Kidney Disease	41
Asthma	11
Osteoperosis	14
Atrial Fibrilation	17
Heart Failure	23
Chronic Obstructive Pulmonary Disease	17
Diabetes	31
Dementia	16
Cancer	19

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Clay Hughes Napper, MD treated as a diagnostic radiologist in San Mateo, CA during 2019 were CT scan, abdominal imaging, pelvic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. Clay Hughes Napper, MD for Medicare patients.

abdominal imaging	386
brain imaging (neuroimaging)	184
breast procedures	69
CT scan	557
musculoskeletal imaging	114
neck imaging	31
pelvic imaging	284
preventive care	50
spinal procedures	44
thoracic (chest) imaging	100
ultrasound (sonogram)	233
women's imaging	86
X-rays	197

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Clay Hughes Napper, MD.

**Gender**
Male	696
Female	977

**Ethnicity**
Non-Hispanic White	1080
Black	0
Hispanic	220
Asian	245
Other	90
Native American	0

**Age**
From 65 to 74	685
From 75 to 84	570
85 and over	320
Less than 65	98

Conditions of Medicare patients treated by Dr. Clay Hughes Napper, MD in 2019

Hypertension	68
High Cholesterol	62
Stroke	7
Ischemic Heart Disease	31
Depression	22
Chronic Kidney Disease	39
Asthma	11
Osteoperosis	15
Atrial Fibrilation	16
Heart Failure	25
Chronic Obstructive Pulmonary Disease	16
Diabetes	29
Dementia	15
Cancer	16

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Clay Hughes Napper, MD treated as a diagnostic radiologist in San Mateo, CA during 2020 were CT scan, abdominal imaging, pelvic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. Clay Hughes Napper, MD for Medicare patients.

abdominal imaging	375
brain imaging (neuroimaging)	165
breast procedures	21
CT scan	538
musculoskeletal imaging	111
neck imaging	26
pelvic imaging	259
preventive care	21
spinal procedures	19
thoracic (chest) imaging	117
ultrasound (sonogram)	212
women's imaging	38
X-rays	132

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Clay Hughes Napper, MD.

**Gender**
Male	664
Female	854

**Ethnicity**
Non-Hispanic White	1072
Black	0
Hispanic	147
Asian	206
Other	64
Native American	0

**Age**
From 65 to 74	600
From 75 to 84	516
85 and over	321
Less than 65	81

Conditions of Medicare patients treated by Dr. Clay Hughes Napper, MD in 2020

Hypertension	70
High Cholesterol	62
Stroke	7
Ischemic Heart Disease	36
Depression	24
Chronic Kidney Disease	40
Asthma	9
Osteoperosis	14
Atrial Fibrilation	16
Heart Failure	26
Chronic Obstructive Pulmonary Disease	13
Diabetes	32
Dementia	16
Cancer	18

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Clay Hughes Napper, MD treated as a diagnostic radiologist in San Mateo, CA during 2021 were X-rays, CT scan, abdominal imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. Clay Hughes Napper, MD for Medicare patients.

abdominal imaging	382
brain imaging (neuroimaging)	180
breast procedures	302
CT scan	486
diagnostic imaging	40
musculoskeletal imaging	236
neck imaging	39
pelvic imaging	264
preventive care	202
spinal procedures	38
thoracic (chest) imaging	87
ultrasound (sonogram)	345
women's imaging	329
X-rays	519

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Clay Hughes Napper, MD.

**Gender**
Male	667
Female	1271

**Ethnicity**
Non-Hispanic White	1324
Black	0
Hispanic	200
Asian	267
Other	110
Native American	0

**Age**
From 65 to 74	788
From 75 to 84	682
85 and over	381
Less than 65	87

Conditions of Medicare patients treated by Dr. Clay Hughes Napper, MD in 2021

Hypertension	68
High Cholesterol	63
Stroke	6
Ischemic Heart Disease	31
Depression	21
Chronic Kidney Disease	35
Asthma	9
Osteoperosis	17
Atrial Fibrilation	15
Heart Failure	23
Chronic Obstructive Pulmonary Disease	12
Diabetes	29
Dementia	13
Cancer	17

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Clay Hughes Napper, MD treated as a diagnostic radiologist in San Mateo, CA during 2022 were CT scan, abdominal imaging, X-rays and ultrasound (sonogram).

Volume of procedures performed by Dr. Clay Hughes Napper, MD for Medicare patients.

abdominal imaging	334
brain imaging (neuroimaging)	157
breast procedures	50
CT scan	409
musculoskeletal imaging	247
neck imaging	56
pelvic imaging	220
preventive care	50
spinal procedures	26
thoracic (chest) imaging	94
ultrasound (sonogram)	313
women's imaging	79
X-rays	327

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Clay Hughes Napper, MD.

**Gender**
Male	654
Female	1001

**Ethnicity**
Non-Hispanic White	1064
Black	0
Hispanic	199
Asian	273
Other	85
Native American	0

**Age**
From 65 to 74	645
From 75 to 84	602
85 and over	329
Less than 65	79

Conditions of Medicare patients treated by Dr. Clay Hughes Napper, MD in 2022

Hypertension	74
High Cholesterol	75
Stroke	9
Ischemic Heart Disease	25
Depression	18
Chronic Kidney Disease	30
Asthma	13
Osteoperosis	21
Atrial Fibrilation	22
Heart Failure	22
Chronic Obstructive Pulmonary Disease	14
Diabetes	32
Dementia	12
Cancer	19

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Clay Hughes Napper, MD for Medicare patients.

The highest averages for the top procedures that Dr. Clay Hughes Napper, MD treated as a diagnostic radiologist in San Mateo, CA were CT scan, X-rays, thoracic (chest) imaging and abdominal imaging.

abdominal imaging	384
brain imaging (neuroimaging)	182
breast procedures	60
CT scan	594
diagnostic imaging	40
hip imaging	41
MRI (magnetic resonance imaging)	11
musculoskeletal imaging	125
neck imaging	35
nuclear scan	11
pelvic imaging	302
preventive care	49
spinal procedures	37
thoracic (chest) imaging	458
ultrasound (sonogram)	210
women's imaging	80
X-rays	554

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Clay Hughes Napper, MD.

**Gender**
Male	695
Female	987

**Ethnicity**
Black / African American	7
Asian / Pacific Islander	215
Non-Hispanic White	1184
Native American / Alaskan Native	0
Hispanic	175
Other	59

**Age**
75 to 84	562
85 and over	377
Less than 65	104
65 to 74	638

Average of Total of Conditions of Medicare patients treated by Dr. Clay Hughes Napper, MD From 2012 - 2022

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

Hypertension	65
High Cholesterol	57
Stroke	7
Ischemic Heart Disease	29
Depression	19
Chronic Kidney Disease	33
Asthma	11
Osteoporosis	13
Heart Failure	23
Chronic Obstructive Pulmonary Disease	14
Diabetes	28
Atrial Fibrillation	16
Dementia	13
Cancer	17

Education & Training

Dr. Clay Hughes Napper, MD graduated from Wake Forest University School of Medicine. He completed residency at Stanford University Medical Center. He is certified by the Board Certification: Radiology and has a state license in California.

Medical School: Wake Forest University School of Medicine

Residency: Stanford University Medical Center

Board Certification: Board Certification: Radiology

Licensed In: California

Affiliations & Hospitals

Dr. Clay Hughes Napper, MD is associated with these hospitals and organizations:

Sutter Health

Insurance Information

Please note: Insurance information may change at any time, and the provider may accept your insurance plan even if it is not listed below. Please contact the provider's office to confirm that your insurance is accepted.

Dr. Clay Hughes Napper, MD appears to accept the following insurance providers: Cigna, Medicare Advantage, Blue Shield of California, Anthem Blue Cross of California, United Healthcare, Accepted Sutter Health Plan Plans: Individual and Family Plan HMO: Large and Small Group HMO, Accepted Aetna Plans: Aetna Value Network HMO (AVN) and Accepted Health Net Plans: ELECT Open Access POS, Large and Small Group: ELECT POS, Large and Small Group: Health Net HMO: Large Group (101+ employees) & Small Group (2-100 employees): Health Net....

Insurance Accepted by Provider includes:

According to our sources, Dr. Clay Hughes Napper, MD accepts the following insurance providers:

Cigna

Medicare Advantage

Blue Shield of California

Anthem Blue Cross of California

United Healthcare

Accepted Sutter Health Plan Plans: Individual and Family Plan HMO: Large and Small Group HMO

Accepted Aetna Plans: Aetna Value Network HMO (AVN)

Accepted Health Net Plans: ELECT Open Access POS, Large and Small Group: ELECT POS, Large and Small Group: Health Net HMO: Large Group (101+ employees) & Small Group (2-100 employees): Health Net...

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General Payments

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

**Payments by Company**
Advanced Accelerator Applications	$39 LUTATHERA (lutetium LU 177 dotatate) $39
Genentech USA, Inc.	$24 Activase $24
Edwards Lifesciences Corporation	$17 $17
GE Healthcare	$8 Ultrasound $8

**Types of Payments**
Food and Beverage	$89

Biography

Dr. Clay Napper's area of specialization is diagnostic radiology. He is professionally affiliated with Sutter Health. Dr. Napper attended Wake Forest University School of Medicine and subsequently trained at Stanford University Medical Center for residency. He most likely takes Blue Shield, Anthem, and Blue California, as well as other insurance carriers.