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Home > TX Providers > Cardiac Electrophysiologists

Dr. Stephen Allen May, MD

Accepting New Patients

(6 Ratings)

Specializes in: Cardiac Electrophysiology (Heart Rhythm) and Adult Cardiology

Baylor College of Medicine

8715 Village Drive Suite 518
San Antonio, TX 78217

(210) 590-7712

Dr. Stephen Allen May, MD is a cardiac electrophysiologist in San Antonio, TX specializing in cardiac electrophysiology (heart rhythm) and adult cardiology. He graduated from Baylor College of Medicine. Dr. Stephen Allen May, MD is affiliated with CHRISTUS Health and Arrhythmia Associates of South Texas.

Office Locations

8715 Village Drive Suite 518
San Antonio, TX 78217

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Noteworthy Medicare Patient Procedures Performed by Dr. Stephen Allen May, MD in 2023

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

Top 5%

By Affordability:

color Doppler echocardiography

Doppler echocardiography

spectral Doppler echocardiography

transthoracic echocardiography

In 2023, Dr. Stephen Allen May, MD had a list price for color Doppler echocardiography, Doppler echocardiography, spectral Doppler echocardiography, and transthoracic echocardiography (TTE) that was lower than the list prices billed to Medicare by 95% of providers in related specialties within Texas. 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:

hospital care

inpatient care

inpatient hospital care

In 2023, Dr. Stephen Allen May, 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 90% of providers in related specialties within Texas. 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:

minimally invasive procedures

By Affordability:

cardiac imaging

cardioversion

echocardiogram

elective cardioversion

elective external cardioversion

external cardioversion

In 2012, among providers in related specialties within Texas, Dr. Stephen Allen May, MD performed more minimally invasive procedures procedures for Medicare patients than 75% of them and he also had a list price for cardiac imaging, cardioversion, echocardiogram (echo), elective cardioversion, elective external cardioversion, and external cardioversion 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. Stephen Allen May, MD treated as a cardiac electrophysiologist in San Antonio, TX during 2012 were hospital care and inpatient care.

Volume of procedures performed by Dr. Stephen Allen May, MD for Medicare patients.

hospital care	18
inpatient care	18

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Stephen Allen May, MD treated as a cardiac electrophysiologist in San Antonio, TX during 2013 were hospital care, inpatient care, cardiac procedures and minimally invasive procedures.

Volume of procedures performed by Dr. Stephen Allen May, MD for Medicare patients.

cardiac procedures	43
doctor visit	177
hospital care	171
implant surgery	23
inpatient care	171
minimally invasive procedures	23
ultrasound (sonogram)	20

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Stephen Allen May, MD.

**Gender**
Male	104
Female	109

**Ethnicity**
Non-Hispanic White	155
Black	0
Hispanic	40
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	83
From 75 to 84	74
85 and over	32
Less than 65	24

Conditions of Medicare patients treated by Dr. Stephen Allen May, MD in 2013

Hypertension	75
High Cholesterol	75
Stroke	12
Ischemic Heart Disease	70
Depression	25
Chronic Kidney Disease	46
Asthma	13
Osteoperosis	7
Atrial Fibrilation	52
Heart Failure	53
Chronic Obstructive Pulmonary Disease	34
Diabetes	46
Dementia	20
Cancer	15

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Stephen Allen May, MD treated as a cardiac electrophysiologist in San Antonio, TX during 2014 were cardiac procedures, minimally invasive procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Stephen Allen May, MD for Medicare patients.

ablation	39
cardiac procedures	207
cardioversion	15
catheterization	39
diagnostic procedures	39
doctor visit	281
hospital care	166
implant surgery	62
implantable cardioverter-defibrillator (ICD) replacement	19
inpatient care	166
minimally invasive procedures	203
ultrasound (sonogram)	106

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Stephen Allen May, MD.

**Gender**
Male	158
Female	166

**Ethnicity**
Non-Hispanic White	242
Black	0
Hispanic	58
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	130
From 75 to 84	109
85 and over	49
Less than 65	36

Conditions of Medicare patients treated by Dr. Stephen Allen May, MD in 2014

Hypertension	75
High Cholesterol	73
Stroke	10
Ischemic Heart Disease	65
Depression	25
Chronic Kidney Disease	47
Asthma	9
Osteoperosis	6
Atrial Fibrilation	59
Heart Failure	53
Chronic Obstructive Pulmonary Disease	27
Diabetes	39
Dementia	18
Cancer	9

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Stephen Allen May, MD treated as a cardiac electrophysiologist in San Antonio, TX during 2015 were minimally invasive procedures, cardiac procedures, hospital care and ultrasound (sonogram).

Volume of procedures performed by Dr. Stephen Allen May, MD for Medicare patients.

ablation	71
cardiac procedures	284
cardioversion	15
catheterization	71
diagnostic procedures	56
doctor visit	424
hospital care	153
implant surgery	66
implantable cardioverter-defibrillator (ICD) replacement	16
inpatient care	126
minimally invasive procedures	317
outpatient care	27
ultrasound (sonogram)	147

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Stephen Allen May, MD.

**Gender**
Male	374
Female	398

**Ethnicity**
Non-Hispanic White	592
Black	42
Hispanic	116
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	306
From 75 to 84	282
85 and over	116
Less than 65	68

Conditions of Medicare patients treated by Dr. Stephen Allen May, MD in 2015

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	69
Depression	19
Chronic Kidney Disease	41
Asthma	17
Osteoperosis	9
Atrial Fibrilation	59
Heart Failure	51
Chronic Obstructive Pulmonary Disease	25
Diabetes	38
Dementia	15
Cancer	8

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Stephen Allen May, MD treated as a cardiac electrophysiologist in San Antonio, TX during 2016 were minimally invasive procedures, cardiac procedures, ultrasound (sonogram) and hospital care.

Volume of procedures performed by Dr. Stephen Allen May, MD for Medicare patients.

ablation	47
cardiac procedures	266
cardioversion	16
catheterization	47
diagnostic procedures	47
doctor visit	546
hospital care	113
implant surgery	67
implantable cardioverter-defibrillator (ICD) replacement	11
inpatient care	113
lab tests	23
minimally invasive procedures	278
ultrasound (sonogram)	152

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Stephen Allen May, MD.

**Gender**
Male	233
Female	228

**Ethnicity**
Non-Hispanic White	361
Black	22
Hispanic	61
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	190
From 75 to 84	168
85 and over	74
Less than 65	29

Conditions of Medicare patients treated by Dr. Stephen Allen May, MD in 2016

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	65
Depression	20
Chronic Kidney Disease	43
Asthma	25
Osteoperosis	8
Atrial Fibrilation	63
Heart Failure	41
Chronic Obstructive Pulmonary Disease	22
Diabetes	38
Dementia	16
Cancer	10

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Stephen Allen May, MD treated as a cardiac electrophysiologist in San Antonio, TX during 2017 were minimally invasive procedures, cardiac procedures, ultrasound (sonogram) and implant surgery.

Volume of procedures performed by Dr. Stephen Allen May, MD for Medicare patients.

ablation	77
cardiac procedures	370
cardioversion	18
catheterization	77
device removal	12
diagnostic procedures	61
doctor visit	474
hospital care	76
implant surgery	103
implantable cardioverter-defibrillator (ICD) replacement	18
inpatient care	76
minimally invasive procedures	410
ultrasound (sonogram)	190

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Stephen Allen May, MD.

**Gender**
Male	251
Female	268

**Ethnicity**
Non-Hispanic White	394
Black	15
Hispanic	91
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	199
From 75 to 84	202
85 and over	84
Less than 65	34

Conditions of Medicare patients treated by Dr. Stephen Allen May, MD in 2017

Hypertension	75
High Cholesterol	72
Stroke	11
Ischemic Heart Disease	64
Depression	17
Chronic Kidney Disease	49
Asthma	9
Osteoperosis	6
Atrial Fibrilation	63
Heart Failure	48
Chronic Obstructive Pulmonary Disease	22
Diabetes	37
Dementia	17
Cancer	11

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Stephen Allen May, MD treated as a cardiac electrophysiologist in San Antonio, TX during 2018 were minimally invasive procedures, cardiac procedures, ultrasound (sonogram) and implant surgery.

Volume of procedures performed by Dr. Stephen Allen May, MD for Medicare patients.

ablation	55
cardiac procedures	263
cardioversion	21
catheterization	55
diagnostic procedures	42
doctor visit	396
hospital care	11
implant surgery	73
implantable cardioverter-defibrillator (ICD) replacement	15
inpatient care	11
lab tests	27
minimally invasive procedures	281
ultrasound (sonogram)	135

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Stephen Allen May, MD.

**Gender**
Male	253
Female	230

**Ethnicity**
Non-Hispanic White	374
Black	14
Hispanic	78
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	175
From 75 to 84	199
85 and over	83
Less than 65	26

Conditions of Medicare patients treated by Dr. Stephen Allen May, MD in 2018

Hypertension	75
High Cholesterol	75
Stroke	11
Ischemic Heart Disease	65
Depression	19
Chronic Kidney Disease	46
Asthma	10
Osteoperosis	8
Atrial Fibrilation	59
Heart Failure	46
Chronic Obstructive Pulmonary Disease	20
Diabetes	34
Dementia	18
Cancer	11

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Stephen Allen May, MD treated as a cardiac electrophysiologist in San Antonio, TX during 2019 were minimally invasive procedures, cardiac procedures, ultrasound (sonogram) and catheterization.

Volume of procedures performed by Dr. Stephen Allen May, MD for Medicare patients.

ablation	68
cardiac procedures	279
cardioversion	21
catheterization	68
diagnostic procedures	53
doctor visit	502
hospital care	39
implant surgery	43
implantable cardioverter-defibrillator (ICD) replacement	16
inpatient care	39
minimally invasive procedures	300
ultrasound (sonogram)	168

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Stephen Allen May, MD.

**Gender**
Male	283
Female	287

**Ethnicity**
Non-Hispanic White	440
Black	23
Hispanic	85
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	228
From 75 to 84	222
85 and over	93
Less than 65	27

Conditions of Medicare patients treated by Dr. Stephen Allen May, MD in 2019

Hypertension	75
High Cholesterol	75
Stroke	9
Ischemic Heart Disease	66
Depression	21
Chronic Kidney Disease	46
Asthma	10
Osteoperosis	12
Atrial Fibrilation	59
Heart Failure	48
Chronic Obstructive Pulmonary Disease	18
Diabetes	36
Dementia	15
Cancer	12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Stephen Allen May, MD treated as a cardiac electrophysiologist in San Antonio, TX during 2020 were cardiac procedures, minimally invasive procedures, ultrasound (sonogram) and implant surgery.

Volume of procedures performed by Dr. Stephen Allen May, MD for Medicare patients.

ablation	33
cardiac procedures	200
cardioversion	27
catheterization	33
diagnostic procedures	33
doctor visit	466
hospital care	11
implant surgery	48
implantable cardioverter-defibrillator (ICD) replacement	12
inpatient care	11
minimally invasive procedures	195
ultrasound (sonogram)	119

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Stephen Allen May, MD.

**Gender**
Male	287
Female	281

**Ethnicity**
Non-Hispanic White	444
Black	23
Hispanic	82
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	223
From 75 to 84	229
85 and over	87
Less than 65	29

Conditions of Medicare patients treated by Dr. Stephen Allen May, MD in 2020

Hypertension	75
High Cholesterol	75
Stroke	11
Ischemic Heart Disease	64
Depression	21
Chronic Kidney Disease	46
Asthma	8
Osteoperosis	9
Atrial Fibrilation	58
Heart Failure	48
Chronic Obstructive Pulmonary Disease	17
Diabetes	38
Dementia	15
Cancer	11

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Stephen Allen May, MD treated as a cardiac electrophysiologist in San Antonio, TX during 2021 were cardiac procedures, minimally invasive procedures, ultrasound (sonogram) and catheterization.

Volume of procedures performed by Dr. Stephen Allen May, MD for Medicare patients.

ablation	35
cardiac procedures	225
cardioversion	21
catheterization	35
diagnostic procedures	35
doctor visit	423
hospital care	12
implant surgery	30
inpatient care	12
minimally invasive procedures	194
ultrasound (sonogram)	160

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Stephen Allen May, MD.

**Gender**
Male	310
Female	287

**Ethnicity**
Non-Hispanic White	455
Black	27
Hispanic	96
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	230
From 75 to 84	245
85 and over	100
Less than 65	22

Conditions of Medicare patients treated by Dr. Stephen Allen May, MD in 2021

Hypertension	75
High Cholesterol	75
Stroke	11
Ischemic Heart Disease	60
Depression	20
Chronic Kidney Disease	48
Asthma	9
Osteoperosis	9
Atrial Fibrilation	56
Heart Failure	46
Chronic Obstructive Pulmonary Disease	14
Diabetes	38
Dementia	14
Cancer	13

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Stephen Allen May, MD treated as a cardiac electrophysiologist in San Antonio, TX during 2022 were cardiac procedures, minimally invasive procedures, ultrasound (sonogram) and catheterization.

Volume of procedures performed by Dr. Stephen Allen May, MD for Medicare patients.

ablation	50
cardiac procedures	258
cardioversion	15
catheterization	50
diagnostic procedures	37
doctor visit	399
hospital care	18
implant surgery	27
inpatient care	18
minimally invasive procedures	251
ultrasound (sonogram)	181

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Stephen Allen May, MD.

**Gender**
Male	334
Female	314

**Ethnicity**
Non-Hispanic White	518
Black	22
Hispanic	88
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	240
From 75 to 84	276
85 and over	114
Less than 65	18

Conditions of Medicare patients treated by Dr. Stephen Allen May, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	15
Ischemic Heart Disease	50
Depression	21
Chronic Kidney Disease	38
Asthma	13
Osteoperosis	13
Atrial Fibrilation	74
Heart Failure	51
Chronic Obstructive Pulmonary Disease	20
Diabetes	37
Dementia	9
Cancer	15

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Stephen Allen May, MD for Medicare patients.

The highest averages for the top procedures that Dr. Stephen Allen May, MD treated as a cardiac electrophysiologist in San Antonio, TX were minimally invasive procedures, cardiac procedures, ultrasound (sonogram) and hospital care.

ablation	52
cardiac procedures	239
cardioversion	18
catheterization	52
device removal	12
diagnostic procedures	44
doctor visit	408
hospital care	71
implant surgery	54
implantable cardioverter-defibrillator (ICD) replacement	15
inpatient care	69
lab tests	25
minimally invasive procedures	245
outpatient care	27
ultrasound (sonogram)	137

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Stephen Allen May, MD.

**Gender**
Male	235
Female	233

**Ethnicity**
Black / African American	17
Asian / Pacific Islander	0
Non-Hispanic White	361
Native American / Alaskan Native	0
Hispanic	72
Other	0

**Age**
75 to 84	182
85 and over	75
Less than 65	28
65 to 74	182

Average of Total of Conditions of Medicare patients treated by Dr. Stephen Allen May, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Stephen Allen May, MD treated were high cholesterol, hypertension, ischemic heart disease and atrial fibrilation.

Hypertension	68
High Cholesterol	67
Stroke	9
Ischemic Heart Disease	58
Depression	18
Chronic Kidney Disease	40
Asthma	11
Osteoporosis	7
Heart Failure	44
Chronic Obstructive Pulmonary Disease	19
Diabetes	34
Atrial Fibrillation	54
Dementia	14
Cancer	10

Education & Training

Dr. Stephen Allen May, MD graduated from Baylor College of Medicine. He completed residency at Emory University Affiliated Hospitals. He is certified by the Certification: American Board of Internal Medicine and has a state license in Georgia.

Medical School: Baylor College of Medicine

Residency: Emory University Affiliated Hospitals

Board Certification: Certification: American Board of Internal Medicine

Licensed In: Georgia

Affiliations & Hospitals

Dr. Stephen Allen May, MD is associated with these hospitals and organizations:

CHRISTUS Health

Arrhythmia Associates of South Texas

Ratings & Reviews

Dr. Stephen Allen May, MD has an exceptional overall rating with an average of 5.0 out of 5 stars based on 6 ratings. We collect ratings and reviews of Dr. Stephen Allen May, MD from all over the web to help you find the right in San Antonio, TX.

Overall Rating

(6 Ratings)

Leave a Review

Reviews From Around The Web

Overall Rating: 5.0 2026-01-30

Patient verified via Press Ganey

Everyone was friendly and caring. But Dr. May was outstanding. He spent time explaining my issues and seemed truly thoughtful as he helped me understand what was happening. He also seemed caring as he explained the difficulties of my treatment. He looks young, but he is brilliant and has my complete confidence.

Overall Rating: 5.0 2025-12-01

Patient verified via Press Ganey

Dr. May is easy to talk to and understand. I have confidence in his judgment and ability.

Overall Rating: 5.0 2025-06-21

Patient verified via Press Ganey

I was treated with dignity & respect. My questions & concerns were addressed & answered.

Overall Rating: 5.0 2025-08-24

Patient verified via Press Ganey

Dr May explained everything in great detail. Gave me options and made me feel hopeful.

Overall Rating: 5.0 2025-06-28

Patient verified via Press Ganey

Wonderful Doctor!

Overall Rating: 5.0 2025-09-21

Patient verified via Press Ganey

All good.

General Payments

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

**Payments by Company**
Medtronic Vascular, Inc.	$26,214 Implantable Cardioverter Defibrillators - ICDs $3,627	Cardiac Resynchronization Therapy - CRT $2,593	Micra $1,727	Pacemakers $640	SEEQ $175	Other $17,452
Abbott Laboratories	$15,213 Assurity Pacemaker $3,829	ICDs $2,555	CRT-Ds $2,106	Quartet CRT Lead $1,648	CRT-Ps $1,248	Other $3,828
St. Jude Medical, Inc.	$4,121 CRM $1,666	Ensite $1,125	Unify Assura $237	Electrophysiology $174	Vascular $169	Other $750
Biosense Webster, Inc.	$4,080 Ablation CathetersAccessories $2,750	Carto 3 System $748	OtherNA $342	Carto 3 $115	CartoSound $105	Other $20
Medical Device Business Services, Inc.	$557 $557
Other	$1,880 LifeVest $381	Bradycardia products $258	WATCHMAN $146	Structural Heart $134	Micra $125	Other $836

**Types of Payments**
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$17,375
Consulting Fee	$17,170
Food and Beverage	$10,477
Travel and Lodging	$7,002
Education	$41

Biography

Dr. Stephen May practices adult cardiology and cardiac electrophysiology (heart rhythm) in San Antonio, TX. He is affiliated with CHRISTUS Health. Before performing his residency at a hospital affiliated with Emory University, Dr. May attended Baylor College of Medicine for medical school. Patient ratings for Dr. May average 5.0 stars (out of 5). Dr. May has received the following distinction: Texas Rising Stars. His practice in San Antonio, TX is open to new patients as reported by Doctor.com.