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Dr. Gregory S. Martinez, MD

(Dr. Gregory Martinez, M.D.)

(No ratings)

Specializes in: Adult Nephrology

Thomas Jefferson University, Jefferson Medical College

Professional interests include: kidney problems

568 E Herndon Avenue Suite 201
Fresno, CA 93720

(559) 228-6000

Dr. Gregory S. Martinez, MD is a nephrologist in Selma, CA specializing in adult nephrology. He graduated from Thomas Jefferson University, Jefferson Medical College. Dr. Gregory S. Martinez, MD is affiliated with Saint Agnes Medical Center, Dignity Health, UNIVERSITY FACULTY ASSOCIATES INC and THE NEPHROLOGY GROUP INC.

Office Locations

1205 Evergreen Street
Selma, CA 93662

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233 E Caldwell Avenue
Visalia, CA 93277

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Dignity Health

568 E Herndon Avenue Suite 201
Fresno, CA 93720

(559) 228-6000

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800 N Street
Sanger, CA 93657

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Noteworthy Medicare Patient Procedures Performed by Dr. Gregory S. Martinez, MD in 2023

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

Top 5%

By Affordability:

acute hepatitis panel

In 2023, Dr. Gregory S. Martinez, MD had a list price for acute hepatitis panel, cystatin C test, hematocrit test, hepatitis testing, and reticulocyte count (immature red blood cell count) that was lower than the list prices billed to Medicare by 95% 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 10%

By Affordability:

A1C test

diabetes screening

glycated protein test

hemoglobin test

phosphorus blood test

phosphorus test

vitamin B12 test

In 2023, Dr. Gregory S. Martinez, MD had a list price for A1C test, diabetes screening, glycated protein test, hemoglobin test, phosphorus blood test, phosphorus test, and vitamin B12 test 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 Volume:

blood draw

creatinine urine test

lab tests

phlebotomy for lab tests

phosphorus blood test

total protein urine test

uric acid blood test

By Affordability:

albumin test

creatinine test

creatinine urine test

microalbumin urine test

parathyroid hormone test

post void residual study

serum folate test

total protein test

total protein urine test

vitamin D test

In 2012, among providers in related specialties within California, Dr. Gregory S. Martinez, MD performed more blood draw, creatinine urine test, lab tests, phlebotomy for lab tests, phosphorus blood test, total protein urine test, and uric acid blood test procedures for Medicare patients than 75% of them and he also had a list price for albumin test, creatinine test, creatinine urine test, diabetes management, folic acid tests, iron tests, magnesium test, microalbumin test, microalbumin urine test, parathyroid hormone (PTH) test, post void residual study, serum folate test, total protein test, total protein urine test, and vitamin D test 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. Gregory S. Martinez, MD treated as a nephrologist in Selma, CA during 2012 were hospital care, inpatient care, dialysis and lab tests.

Volume of procedures performed by Dr. Gregory S. Martinez, MD for Medicare patients.

abdominal imaging	19
dialysis	380
doctor visit	651
hospital care	1500
inpatient care	1500
lab tests	62
ultrasound (sonogram)	19

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Gregory S. Martinez, MD treated as a nephrologist in Selma, CA during 2013 were hospital care, inpatient care, dialysis and lab tests.

Volume of procedures performed by Dr. Gregory S. Martinez, MD for Medicare patients.

abdominal imaging	15
dialysis	366
doctor visit	844
hospital care	1722
inpatient care	1722
lab tests	62
ultrasound (sonogram)	15

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory S. Martinez, MD.

**Gender**
Male	510
Female	545

**Ethnicity**
Non-Hispanic White	368
Black	108
Hispanic	447
Asian	103
Other	16
Native American	13

**Age**
From 65 to 74	321
From 75 to 84	291
85 and over	133
Less than 65	310

Conditions of Medicare patients treated by Dr. Gregory S. Martinez, MD in 2013

Hypertension	75
High Cholesterol	65
Stroke	10
Ischemic Heart Disease	60
Depression	20
Chronic Kidney Disease	75
Asthma	16
Osteoperosis	7
Atrial Fibrilation	14
Heart Failure	56
Chronic Obstructive Pulmonary Disease	21
Diabetes	71
Dementia	20
Cancer	9

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Gregory S. Martinez, MD treated as a nephrologist in Selma, CA during 2014 were hospital care, inpatient care, dialysis and lab tests.

Volume of procedures performed by Dr. Gregory S. Martinez, MD for Medicare patients.

abdominal imaging	13
dialysis	291
doctor visit	757
hospital care	1773
inpatient care	1752
lab tests	67
outpatient care	21
ultrasound (sonogram)	13
vascular procedures	28

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory S. Martinez, MD.

**Gender**
Male	486
Female	513

**Ethnicity**
Non-Hispanic White	387
Black	90
Hispanic	396
Asian	95
Other	14
Native American	17

**Age**
From 65 to 74	334
From 75 to 84	261
85 and over	139
Less than 65	265

Conditions of Medicare patients treated by Dr. Gregory S. Martinez, MD in 2014

Hypertension	75
High Cholesterol	71
Stroke	11
Ischemic Heart Disease	61
Depression	22
Chronic Kidney Disease	75
Asthma	15
Osteoperosis	8
Atrial Fibrilation	16
Heart Failure	57
Chronic Obstructive Pulmonary Disease	21
Diabetes	71
Dementia	18
Cancer	10

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Gregory S. Martinez, MD treated as a nephrologist in Selma, CA during 2015 were hospital care, inpatient care, dialysis and lab tests.

Volume of procedures performed by Dr. Gregory S. Martinez, MD for Medicare patients.

abdominal imaging	25
chronic care	23
dialysis	249
doctor visit	708
hospital care	1315
inpatient care	1302
lab tests	54
outpatient care	13
ultrasound (sonogram)	25

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory S. Martinez, MD.

**Gender**
Male	904
Female	910

**Ethnicity**
Non-Hispanic White	662
Black	198
Hispanic	762
Asian	148
Other	22
Native American	22

**Age**
From 65 to 74	596
From 75 to 84	428
85 and over	232
Less than 65	558

Conditions of Medicare patients treated by Dr. Gregory S. Martinez, MD in 2015

Hypertension	75
High Cholesterol	70
Stroke	11
Ischemic Heart Disease	60
Depression	23
Chronic Kidney Disease	75
Asthma	22
Osteoperosis	10
Atrial Fibrilation	13
Heart Failure	56
Chronic Obstructive Pulmonary Disease	21
Diabetes	73
Dementia	16
Cancer	8

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Gregory S. Martinez, MD treated as a nephrologist in Selma, CA during 2016 were hospital care, inpatient care, lab tests and dialysis.

Volume of procedures performed by Dr. Gregory S. Martinez, MD for Medicare patients.

abdominal imaging	54
blood draw	146
dialysis	217
doctor visit	721
hospital care	1197
inpatient care	1197
lab tests	674
ultrasound (sonogram)	68
vascular procedures	14

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory S. Martinez, MD.

**Gender**
Male	466
Female	480

**Ethnicity**
Non-Hispanic White	371
Black	92
Hispanic	374
Asian	78
Other	17
Native American	14

**Age**
From 65 to 74	320
From 75 to 84	244
85 and over	123
Less than 65	259

Conditions of Medicare patients treated by Dr. Gregory S. Martinez, MD in 2016

Hypertension	75
High Cholesterol	71
Stroke	9
Ischemic Heart Disease	60
Depression	24
Chronic Kidney Disease	75
Asthma	30
Osteoperosis	10
Atrial Fibrilation	13
Heart Failure	57
Chronic Obstructive Pulmonary Disease	22
Diabetes	71
Dementia	16
Cancer	9

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Gregory S. Martinez, MD treated as a nephrologist in Selma, CA during 2017 were lab tests, hospital care, inpatient care and blood draw.

Volume of procedures performed by Dr. Gregory S. Martinez, MD for Medicare patients.

abdominal imaging	45
blood draw	403
dialysis	206
doctor visit	752
hospital care	1287
inpatient care	1287
lab tests	2692
ultrasound (sonogram)	45

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory S. Martinez, MD.

**Gender**
Male	495
Female	479

**Ethnicity**
Non-Hispanic White	411
Black	94
Hispanic	361
Asian	78
Other	0
Native American	0

**Age**
From 65 to 74	337
From 75 to 84	258
85 and over	120
Less than 65	259

Conditions of Medicare patients treated by Dr. Gregory S. Martinez, MD in 2017

Hypertension	75
High Cholesterol	66
Stroke	9
Ischemic Heart Disease	60
Depression	25
Chronic Kidney Disease	75
Asthma	15
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	55
Chronic Obstructive Pulmonary Disease	22
Diabetes	69
Dementia	18
Cancer	10

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Gregory S. Martinez, MD treated as a nephrologist in Selma, CA during 2018 were lab tests, hospital care, inpatient care and blood draw.

Volume of procedures performed by Dr. Gregory S. Martinez, MD for Medicare patients.

abdominal imaging	58
blood draw	544
dialysis	140
doctor visit	845
hospital care	1022
inpatient care	1022
lab tests	3829
ultrasound (sonogram)	74
vascular procedures	16

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory S. Martinez, MD.

**Gender**
Male	490
Female	497

**Ethnicity**
Non-Hispanic White	421
Black	79
Hispanic	372
Asian	89
Other	0
Native American	0

**Age**
From 65 to 74	340
From 75 to 84	298
85 and over	125
Less than 65	224

Conditions of Medicare patients treated by Dr. Gregory S. Martinez, MD in 2018

Hypertension	75
High Cholesterol	74
Stroke	9
Ischemic Heart Disease	60
Depression	24
Chronic Kidney Disease	75
Asthma	13
Osteoperosis	11
Atrial Fibrilation	14
Heart Failure	54
Chronic Obstructive Pulmonary Disease	22
Diabetes	70
Dementia	18
Cancer	11

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Gregory S. Martinez, MD treated as a nephrologist in Selma, CA during 2019 were lab tests, hospital care, inpatient care and blood draw.

Volume of procedures performed by Dr. Gregory S. Martinez, MD for Medicare patients.

abdominal imaging	30
blood draw	533
dialysis	140
doctor visit	820
hospital care	1248
inpatient care	1248
lab tests	3517
ultrasound (sonogram)	42
vascular procedures	12

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory S. Martinez, MD.

**Gender**
Male	515
Female	495

**Ethnicity**
Non-Hispanic White	414
Black	74
Hispanic	409
Asian	83
Other	17
Native American	13

**Age**
From 65 to 74	331
From 75 to 84	313
85 and over	145
Less than 65	221

Conditions of Medicare patients treated by Dr. Gregory S. Martinez, MD in 2019

Hypertension	75
High Cholesterol	75
Stroke	10
Ischemic Heart Disease	61
Depression	23
Chronic Kidney Disease	75
Asthma	15
Osteoperosis	9
Atrial Fibrilation	14
Heart Failure	55
Chronic Obstructive Pulmonary Disease	22
Diabetes	70
Dementia	17
Cancer	11

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Gregory S. Martinez, MD treated as a nephrologist in Selma, CA during 2020 were lab tests, hospital care, inpatient care and blood draw.

Volume of procedures performed by Dr. Gregory S. Martinez, MD for Medicare patients.

abdominal imaging	31
blood draw	514
dialysis	76
doctor visit	276
hospital care	827
inpatient care	827
lab tests	3699
minimally invasive procedures	26
ultrasound (sonogram)	31

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory S. Martinez, MD.

**Gender**
Male	424
Female	431

**Ethnicity**
Non-Hispanic White	385
Black	62
Hispanic	305
Asian	79
Other	0
Native American	0

**Age**
From 65 to 74	315
From 75 to 84	256
85 and over	133
Less than 65	151

Conditions of Medicare patients treated by Dr. Gregory S. Martinez, MD in 2020

Hypertension	75
High Cholesterol	74
Stroke	7
Ischemic Heart Disease	59
Depression	22
Chronic Kidney Disease	75
Asthma	13
Osteoperosis	9
Atrial Fibrilation	15
Heart Failure	51
Chronic Obstructive Pulmonary Disease	19
Diabetes	66
Dementia	18
Cancer	10

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Gregory S. Martinez, MD treated as a nephrologist in Selma, CA during 2021 were lab tests, hospital care, inpatient care and blood draw.

Volume of procedures performed by Dr. Gregory S. Martinez, MD for Medicare patients.

abdominal imaging	50
blood draw	450
diabetes management	14
dialysis	82
doctor visit	247
hospital care	1046
inpatient care	1046
lab tests	3455
preventive care	28
ultrasound (sonogram)	50

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory S. Martinez, MD.

**Gender**
Male	444
Female	470

**Ethnicity**
Non-Hispanic White	408
Black	63
Hispanic	337
Asian	85
Other	0
Native American	0

**Age**
From 65 to 74	360
From 75 to 84	271
85 and over	110
Less than 65	173

Conditions of Medicare patients treated by Dr. Gregory S. Martinez, MD in 2021

Hypertension	75
High Cholesterol	75
Stroke	9
Ischemic Heart Disease	63
Depression	21
Chronic Kidney Disease	75
Asthma	15
Osteoperosis	10
Atrial Fibrilation	15
Heart Failure	51
Chronic Obstructive Pulmonary Disease	16
Diabetes	65
Dementia	15
Cancer	9

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Gregory S. Martinez, MD treated as a nephrologist in Selma, CA during 2022 were lab tests, hospital care, inpatient care and blood draw.

Volume of procedures performed by Dr. Gregory S. Martinez, MD for Medicare patients.

abdominal imaging	55
blood draw	508
diabetes management	13
dialysis	81
doctor visit	585
hospital care	1007
inpatient care	1007
lab tests	4158
preventive care	13
ultrasound (sonogram)	68
urologic procedures	22
vascular procedures	55

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory S. Martinez, MD.

**Gender**
Male	477
Female	438

**Ethnicity**
Non-Hispanic White	427
Black	58
Hispanic	325
Asian	82
Other	0
Native American	0

**Age**
From 65 to 74	341
From 75 to 84	309
85 and over	104
Less than 65	161

Conditions of Medicare patients treated by Dr. Gregory S. Martinez, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	14
Ischemic Heart Disease	55
Depression	21
Chronic Kidney Disease	75
Asthma	21
Osteoperosis	15
Atrial Fibrilation	28
Heart Failure	48
Chronic Obstructive Pulmonary Disease	23
Diabetes	68
Dementia	10
Cancer	16

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Gregory S. Martinez, MD for Medicare patients.

The highest averages for the top procedures that Dr. Gregory S. Martinez, MD treated as a nephrologist in Selma, CA were lab tests, hospital care, inpatient care and blood draw.

abdominal imaging	35
blood draw	442
chronic care	23
diabetes management	13
dialysis	202
doctor visit	655
hospital care	1267
inpatient care	1264
lab tests	2024
minimally invasive procedures	26
outpatient care	17
preventive care	20
ultrasound (sonogram)	40
urologic procedures	22
vascular procedures	25

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Gregory S. Martinez, MD.

**Gender**
Male	473
Female	478

**Ethnicity**
Black / African American	83
Asian / Pacific Islander	83
Non-Hispanic White	386
Hispanic	371
Native American / Alaskan Native	7
Other	7

**Age**
75 to 84	266
85 and over	124
Less than 65	234
65 to 74	326

Average of Total of Conditions of Medicare patients treated by Dr. Gregory S. Martinez, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Gregory S. Martinez, MD treated were chronic kidney disease, hypertension, high cholesterol and diabetes.

Hypertension	68
High Cholesterol	65
Stroke	9
Ischemic Heart Disease	54
Depression	20
Chronic Kidney Disease	68
Asthma	15
Osteoporosis	8
Heart Failure	49
Chronic Obstructive Pulmonary Disease	19
Diabetes	63
Atrial Fibrillation	14
Cancer	9
Dementia	15

Education & Training

Dr. Gregory S. Martinez, MD graduated from Thomas Jefferson University, Jefferson Medical College. He completed residency at Cedars-Sinai Medical Center. He is certified by the Nephrology, Nephrology, American Board of Internal Medicine Subspecialty and has a state license in California.

Medical School: Thomas Jefferson University, Jefferson Medical College

Residency: Cedars-Sinai Medical Center (2009)

Board Certification: Nephrology, Nephrology, American Board of Internal Medicine Subspecialty (2011)

Licensed In: California

Affiliations & Hospitals

Dr. Gregory S. Martinez, MD is associated with these hospitals and organizations:

Saint Agnes Medical Center

Dignity Health

UNIVERSITY FACULTY ASSOCIATES INC

THE NEPHROLOGY GROUP INC

Ratings & Reviews

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General Payments

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

**Payments by Company**
Alexion Pharmaceuticals, Inc.	$918 SOLIRIS $918
Otsuka America Pharmaceutical, Inc.	$429 JYNARQUE $310	SAMSCA $119
AstraZeneca Pharmaceuticals LP	$364 FARXIGA $195	LOKELMA $144	CRESTOR $26
Amgen Inc.	$345 Parsabiv $190	Tavneos $116	Sensipar $38
Horizon Therapeutics plc	$254 KRYSTEXXA $254
Other	$1,858 ACTHAR $219	Rituxan $129	Renal - PD $125	VELTASSA $119	AFINITOR $113	Other $1,154

**Types of Payments**
Food and Beverage	$3,341
Consulting Fee	$650
Education	$176

Biography

Dr. Gregory Martinez specializes in adult nephrology. In his practice, he is particularly interested in kidney problems and internal medicine. Dr. Martinez is professionally affiliated with Saint Agnes Medical Center and Dignity Health. Dignity Health reports that he is not accepting new patients. He is a graduate of Thomas Jefferson University, Jefferson Medical College. His residency was performed at Cedars-Sinai Medical Center. Dr. Martinez is conversant in Spanish.