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Home > CA Providers > Nephrologists

Dr. John W. Riordan, MD

Accepting New Patients

(2 Ratings)

Specializes in: Nephrology (Kidney Disease)

University of Texas Medical Branch School of Medicine

2100 Webster Street Suite 320
San Francisco, CA 94115

(415) 923-3456

Dr. John W. Riordan, MD is a nephrologist in San Francisco, CA specializing in nephrology (kidney disease). He graduated from University of Texas Medical Branch School of Medicine. Dr. John W. Riordan, MD is affiliated with Sutter Health.

Office Locations

Sutter Health

2100 Webster Street Suite 320
San Francisco, CA 94115

(415) 923-3456

(415) 923-3121

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Noteworthy Medicare Patient Procedures Performed by Dr. John W. Riordan, MD in 2024

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

Top 25%

By Affordability:

hospital care

inpatient care

inpatient hospital care

In 2012, Dr. John W. Riordan, MD had a list price for hospital care, inpatient care, and inpatient hospital care (for patient admitted to hospital) 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. John W. Riordan, MD treated as a nephrologist in San Francisco, CA during 2012 were hospital care, inpatient care, lab tests and dialysis.

Volume of procedures performed by Dr. John W. Riordan, MD for Medicare patients.

dialysis	24
doctor visit	315
hospital care	751
inpatient care	751
lab tests	35

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John W. Riordan, MD treated as a nephrologist in San Francisco, CA during 2013 were hospital care, inpatient care and lab tests.

Volume of procedures performed by Dr. John W. Riordan, MD for Medicare patients.

doctor visit	280
hospital care	846
inpatient care	846
lab tests	19

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John W. Riordan, MD.

**Gender**
Male	166
Female	140

**Ethnicity**
Non-Hispanic White	127
Black	68
Hispanic	31
Asian	66
Other	0
Native American	0

**Age**
From 65 to 74	105
From 75 to 84	77
85 and over	44
Less than 65	80

Conditions of Medicare patients treated by Dr. John W. Riordan, MD in 2013

Hypertension	75
High Cholesterol	62
Stroke	11
Ischemic Heart Disease	51
Depression	24
Chronic Kidney Disease	75
Asthma	14
Osteoperosis	8
Atrial Fibrilation	19
Heart Failure	51
Chronic Obstructive Pulmonary Disease	19
Diabetes	57
Dementia	16
Cancer	11

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John W. Riordan, MD treated as a nephrologist in San Francisco, CA during 2014 were hospital care, inpatient care and lab tests.

Volume of procedures performed by Dr. John W. Riordan, MD for Medicare patients.

doctor visit	323
hospital care	835
inpatient care	835
lab tests	23

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John W. Riordan, MD.

**Gender**
Male	170
Female	138

**Ethnicity**
Non-Hispanic White	135
Black	55
Hispanic	28
Asian	65
Other	0
Native American	0

**Age**
From 65 to 74	100
From 75 to 84	82
85 and over	45
Less than 65	81

Conditions of Medicare patients treated by Dr. John W. Riordan, MD in 2014

Hypertension	75
High Cholesterol	69
Stroke	9
Ischemic Heart Disease	54
Depression	29
Chronic Kidney Disease	75
Asthma	14
Osteoperosis	7
Atrial Fibrilation	20
Heart Failure	50
Chronic Obstructive Pulmonary Disease	15
Diabetes	57
Dementia	13
Cancer	13

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John W. Riordan, MD treated as a nephrologist in San Francisco, CA during 2015 were hospital care, inpatient care and lab tests.

Volume of procedures performed by Dr. John W. Riordan, MD for Medicare patients.

doctor visit	327
hospital care	820
inpatient care	820
lab tests	16

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John W. Riordan, MD.

**Gender**
Male	356
Female	332

**Ethnicity**
Non-Hispanic White	308
Black	116
Hispanic	72
Asian	144
Other	0
Native American	0

**Age**
From 65 to 74	256
From 75 to 84	164
85 and over	114
Less than 65	154

Conditions of Medicare patients treated by Dr. John W. Riordan, MD in 2015

Hypertension	75
High Cholesterol	66
Stroke	14
Ischemic Heart Disease	54
Depression	30
Chronic Kidney Disease	75
Asthma	21
Osteoperosis	9
Atrial Fibrilation	24
Heart Failure	58
Chronic Obstructive Pulmonary Disease	20
Diabetes	62
Dementia	20
Cancer	10

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John W. Riordan, MD treated as a nephrologist in San Francisco, CA during 2016 were hospital care, inpatient care and lab tests.

Volume of procedures performed by Dr. John W. Riordan, MD for Medicare patients.

doctor visit	357
hospital care	872
inpatient care	872
lab tests	24

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John W. Riordan, MD.

**Gender**
Male	192
Female	152

**Ethnicity**
Non-Hispanic White	157
Black	55
Hispanic	38
Asian	69
Other	0
Native American	0

**Age**
From 65 to 74	140
From 75 to 84	88
85 and over	44
Less than 65	72

Conditions of Medicare patients treated by Dr. John W. Riordan, MD in 2016

Hypertension	75
High Cholesterol	66
Stroke	14
Ischemic Heart Disease	55
Depression	27
Chronic Kidney Disease	75
Asthma	27
Osteoperosis	8
Atrial Fibrilation	23
Heart Failure	52
Chronic Obstructive Pulmonary Disease	20
Diabetes	56
Dementia	19
Cancer	11

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John W. Riordan, MD treated as a nephrologist in San Francisco, CA during 2017 were hospital care, inpatient care and lab tests.

Volume of procedures performed by Dr. John W. Riordan, MD for Medicare patients.

doctor visit	382
hospital care	642
inpatient care	642
lab tests	38

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John W. Riordan, MD.

**Gender**
Male	171
Female	138

**Ethnicity**
Non-Hispanic White	137
Black	45
Hispanic	34
Asian	71
Other	0
Native American	0

**Age**
From 65 to 74	113
From 75 to 84	87
85 and over	45
Less than 65	64

Conditions of Medicare patients treated by Dr. John W. Riordan, MD in 2017

Hypertension	75
High Cholesterol	64
Stroke	11
Ischemic Heart Disease	58
Depression	26
Chronic Kidney Disease	75
Asthma	14
Osteoperosis	7
Atrial Fibrilation	22
Heart Failure	53
Chronic Obstructive Pulmonary Disease	20
Diabetes	54
Dementia	22
Cancer	13

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John W. Riordan, MD treated as a nephrologist in San Francisco, CA during 2018 were hospital care, inpatient care and lab tests.

Volume of procedures performed by Dr. John W. Riordan, MD for Medicare patients.

doctor visit	392
hospital care	687
inpatient care	687
lab tests	38

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John W. Riordan, MD.

**Gender**
Male	168
Female	134

**Ethnicity**
Non-Hispanic White	148
Black	33
Hispanic	29
Asian	72
Other	0
Native American	0

**Age**
From 65 to 74	121
From 75 to 84	79
85 and over	39
Less than 65	63

Conditions of Medicare patients treated by Dr. John W. Riordan, MD in 2018

Hypertension	75
High Cholesterol	69
Stroke	11
Ischemic Heart Disease	54
Depression	22
Chronic Kidney Disease	75
Asthma	11
Osteoperosis	8
Atrial Fibrilation	23
Heart Failure	55
Chronic Obstructive Pulmonary Disease	16
Diabetes	56
Dementia	23
Cancer	8

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John W. Riordan, MD treated as a nephrologist in San Francisco, CA during 2019 were hospital care, inpatient care and lab tests.

Volume of procedures performed by Dr. John W. Riordan, MD for Medicare patients.

doctor visit	434
hospital care	776
inpatient care	776
lab tests	35

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John W. Riordan, MD.

**Gender**
Male	173
Female	168

**Ethnicity**
Non-Hispanic White	164
Black	41
Hispanic	26
Asian	89
Other	0
Native American	0

**Age**
From 65 to 74	136
From 75 to 84	117
85 and over	48
Less than 65	40

Conditions of Medicare patients treated by Dr. John W. Riordan, MD in 2019

Hypertension	75
High Cholesterol	70
Stroke	10
Ischemic Heart Disease	52
Depression	27
Chronic Kidney Disease	75
Asthma	11
Osteoperosis	0
Atrial Fibrilation	20
Heart Failure	52
Chronic Obstructive Pulmonary Disease	22
Diabetes	58
Dementia	24
Cancer	11

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John W. Riordan, MD treated as a nephrologist in San Francisco, CA during 2020 were hospital care, inpatient care and lab tests.

Volume of procedures performed by Dr. John W. Riordan, MD for Medicare patients.

doctor visit	352
hospital care	710
inpatient care	710
lab tests	29

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John W. Riordan, MD.

**Gender**
Male	170
Female	169

**Ethnicity**
Non-Hispanic White	157
Black	41
Hispanic	29
Asian	85
Other	0
Native American	0

**Age**
From 65 to 74	135
From 75 to 84	109
85 and over	56
Less than 65	39

Conditions of Medicare patients treated by Dr. John W. Riordan, MD in 2020

Hypertension	75
High Cholesterol	68
Stroke	9
Ischemic Heart Disease	52
Depression	24
Chronic Kidney Disease	75
Asthma	12
Osteoperosis	10
Atrial Fibrilation	20
Heart Failure	51
Chronic Obstructive Pulmonary Disease	16
Diabetes	55
Dementia	21
Cancer	11

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John W. Riordan, MD treated as a nephrologist in San Francisco, CA during 2021 were hospital care, inpatient care and lab tests.

Volume of procedures performed by Dr. John W. Riordan, MD for Medicare patients.

doctor visit	367
hospital care	699
inpatient care	699
lab tests	30

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John W. Riordan, MD.

**Gender**
Male	169
Female	164

**Ethnicity**
Non-Hispanic White	166
Black	38
Hispanic	30
Asian	74
Other	0
Native American	0

**Age**
From 65 to 74	136
From 75 to 84	104
85 and over	46
Less than 65	47

Conditions of Medicare patients treated by Dr. John W. Riordan, MD in 2021

Hypertension	75
High Cholesterol	72
Stroke	9
Ischemic Heart Disease	56
Depression	27
Chronic Kidney Disease	75
Asthma	13
Osteoperosis	11
Atrial Fibrilation	19
Heart Failure	51
Chronic Obstructive Pulmonary Disease	18
Diabetes	57
Dementia	23
Cancer	13

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John W. Riordan, MD treated as a nephrologist in San Francisco, CA during 2022 were hospital care, inpatient care and lab tests.

Volume of procedures performed by Dr. John W. Riordan, MD for Medicare patients.

doctor visit	467
hospital care	872
inpatient care	872
lab tests	39

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John W. Riordan, MD.

**Gender**
Male	199
Female	182

**Ethnicity**
Non-Hispanic White	190
Black	43
Hispanic	36
Asian	95
Other	0
Native American	0

**Age**
From 65 to 74	142
From 75 to 84	139
85 and over	57
Less than 65	43

Conditions of Medicare patients treated by Dr. John W. Riordan, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	14
Ischemic Heart Disease	41
Depression	22
Chronic Kidney Disease	75
Asthma	14
Osteoperosis	14
Atrial Fibrilation	30
Heart Failure	39
Chronic Obstructive Pulmonary Disease	14
Diabetes	52
Dementia	12
Cancer	18

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. John W. Riordan, MD treated as a nephrologist in San Francisco, CA during 2023 were hospital care, inpatient care and lab tests.

Volume of procedures performed by Dr. John W. Riordan, MD for Medicare patients.

doctor visit	469
hospital care	724
inpatient care	724
lab tests	28

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. John W. Riordan, MD.

**Gender**
Male	235
Female	168

**Ethnicity**
Non-Hispanic White	181
Black	45
Hispanic	44
Asian	114
Other	0
Native American	0

**Age**
From 65 to 74	146
From 75 to 84	143
85 and over	53
Less than 65	61

Conditions of Medicare patients treated by Dr. John W. Riordan, MD in 2023

Hypertension	75
High Cholesterol	75
Stroke	15
Ischemic Heart Disease	44
Depression	22
Chronic Kidney Disease	75
Asthma	13
Osteoperosis	12
Atrial Fibrilation	34
Heart Failure	44
Chronic Obstructive Pulmonary Disease	20
Diabetes	56
Dementia	16
Cancer	16

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. John W. Riordan, MD treated as a nephrologist in San Francisco, CA during 2024 were hospital care, inpatient care and lab tests.

Volume of procedures performed by Dr. John W. Riordan, MD for Medicare patients.

doctor visit	359
hospital care	817
inpatient care	817
lab tests	16

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. John W. Riordan, MD.

**Gender**
Male	230
Female	202

**Ethnicity**
Non-Hispanic White	189
Black	62
Hispanic	54
Asian	101
Other	0
Native American	0

**Age**
From 65 to 74	169
From 75 to 84	149
85 and over	59
Less than 65	55

Conditions of Medicare patients treated by Dr. John W. Riordan, MD in 2024

Hypertension	75
High Cholesterol	75
Stroke	16
Ischemic Heart Disease	46
Depression	25
Chronic Kidney Disease	75
Asthma	14
Osteoperosis	14
Atrial Fibrilation	31
Heart Failure	47
Chronic Obstructive Pulmonary Disease	19
Diabetes	59
Dementia	17
Cancer	18

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. John W. Riordan, MD for Medicare patients.

The highest averages for the top procedures that Dr. John W. Riordan, MD treated as a nephrologist in San Francisco, CA were hospital care, inpatient care, lab tests and dialysis.

dialysis	24
doctor visit	371
hospital care	773
inpatient care	773
lab tests	28

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. John W. Riordan, MD.

**Gender**
Male	184
Female	160

**Ethnicity**
Black / African American	49
Asian / Pacific Islander	80
Non-Hispanic White	158
Hispanic	34
Native American / Alaskan Native	0
Other	0

**Age**
85 and over	50
75 to 84	102
Less than 65	61
65 to 74	130

Average of Total of Conditions of Medicare patients treated by Dr. John W. Riordan, MD From 2012 - 2024

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

Hypertension	69
High Cholesterol	63
Stroke	11
Ischemic Heart Disease	47
Depression	23
Chronic Kidney Disease	69
Asthma	13
Osteoporosis	8
Heart Failure	46
Chronic Obstructive Pulmonary Disease	16
Diabetes	52
Atrial Fibrillation	21
Cancer	11
Dementia	17

Education & Training

Dr. John W. Riordan, MD graduated from University of Texas Medical Branch School of Medicine. He completed residency at University of Texas Health Science Center at San Antonio and Affiliated Hospitals. He is certified by the Nephrology - Board Certified and has a state license in California.

Medical School: University of Texas Medical Branch School of Medicine

Residency: University of Texas Health Science Center at San Antonio and Affiliated Hospitals

Board Certification: Nephrology - Board Certified

Licensed In: California

Ratings & Reviews

Dr. John W. Riordan, MD has an exceptional overall rating with an average of 5.0 out of 5 stars based on 2 ratings. We collect ratings and reviews of Dr. John W. Riordan, MD from all over the web to help you find the right in San Francisco, CA.

Overall Rating

(2 Ratings)

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General Payments

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

**Payments by Company**
Edwards Lifesciences Corporation	$436 INSPIRIS RESILIA aortic valve $436
Mallinckrodt LLC	$228 ACTHAR $228
Questcor Pharmaceuticals	$186 ACTHAR $186
Vantive US Healthcare LLC	$141 Renal - PD $141
Amgen Inc.	$123 Sensipar $85	$38
Other	$26 $26

**Types of Payments**
Food and Beverage	$694
Travel and Lodging	$436
Education	$9

Biography

Dr. John Riordan works as a nephrology (kidney disease). Before completing his residency at a hospital affiliated with the University of Texas Health Science Center at San Antonio, Dr. Riordan attended medical school at the University of Texas Medical Branch School of Medicine. Dr. Riordan (or staff) speaks the following languages: Spanish and French. Dr. Riordan is affiliated with Sutter Health. According to Sutter Health, new patients are welcome to contact his office in San Francisco, CA.