Medicare Enrolled
Dr. Stephen May, M.D.
Internal Medicine · San Antonio, TX
Practice pattern: Remote & Electrophysiology
— Practice combining remote and electrophysiology services
Consulting-driven
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. May from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
Are you Dr. May?
Request a correction or review of any data shown here. Provider portal →
What this data tells you about Dr. May
Dr. Stephen May is an internal medicine specialist in San Antonio, TX, with 18 years of NPI registration. Based on federal Medicare data, Dr. May performed 4,434 Medicare services across 2,064 unique beneficiaries.
Between the years covered by Open Payments, Dr. May received a total of $18,732 from 10 pharmaceutical and/or device companies across 80 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in internal medicine. The majority of payments are for consulting, which typically reflects recognized clinical expertise sought by manufacturers. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. May is Very High — reflecting how much public federal data is available about this provider. This is not a quality rating. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 18 years in practice
▲ Top 8% volume in TX
$18,732 industry payments
Medicare Practice Summary
Medicare Utilization ↗4,434
Medicare services
Top 8% in TX for internal medicine
2,064
Unique beneficiaries
$44
Avg. Medicare payment
Medicare patients only (65+ / disabled) · Not a quality rating · How to read this →
~246 Medicare services per year of practice
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Remote cardiac rhythm monitor evaluation, up to 30 days Review and analysis of data from a remote cardiac rhythm monitoring system over a period of up to 30 days. |
1,183 | $18 | $81 |
| Remote monitoring of implantable heart device, up to 30 days Remote evaluation of an implanted heart or blood vessel monitoring system over a period of up to 30 days. |
630 | $19 | $74 |
| Remote pacemaker monitoring, 90 days Remote assessment of a pacemaker system, including single, dual, multiple lead, or leadless devices, performed up to 90 days apart. |
622 | $21 | $100 |
| Electrocardiogram (EKG), 12-lead A standard heart rhythm test using at least 12 leads to record electrical activity. A healthcare provider interprets the results and provides a written report. |
347 | $10 | $58 |
| Remote evaluation of implantable defibrillator system Remote assessment of a single, dual, or multiple lead implantable defibrillator system within 90 days of the previous evaluation. |
247 | $27 | $181 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
165 | $86 | $300 |
| Sedation by physician, initial 15 minutes Administration of a drug to induce depression of consciousness by the physician performing a procedure. This code covers the initial 15 minutes of sedation for patients aged 5 years or older. |
97 | $9 | $77 |
| Pacemaker programming, dual lead system Adjustment and configuration of a dual-lead pacemaker device to ensure proper operation and settings. |
86 | $57 | $179 |
| Transesophageal echocardiogram An ultrasound of the heart performed using a probe inserted into the esophagus to obtain detailed images of heart structures and function. |
85 | $79 | $315 |
| Cardiac rhythm monitor evaluation Review and analysis of data recorded by a cardiac rhythm monitoring device to assess heart activity. |
84 | $34 | $113 |
| Echocardiogram, transthoracic An ultrasound test that uses sound waves to create images of the heart's blood flow, valves, and chambers. |
83 | $13 | $57 |
| New patient office visit, complex (60-74 min) | 76 | $158 | $573 |
| Ultrasound guidance for blood vessel access Use of ultrasound imaging to help locate and access a blood vessel. This guidance assists healthcare providers in performing procedures such as inserting IV lines or drawing blood. |
72 | $11 | $41 |
| Echocardiogram with color Doppler An ultrasound of the heart that uses color imaging to visualize blood flow, measure flow rate, and assess valve function. |
55 | $2 | $11 |
| Insertion of implantable heart rhythm monitor A small device is placed under the skin to continuously record the heart's electrical activity. This helps detect irregular heart rhythms that may not appear during a standard office visit. |
53 | $56 | $256 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
53 | $122 | $401 |
| Heart rhythm stimulator programming after drug infusion Adjustment of a heart rhythm stimulation device following a drug infusion. This procedure involves reprogramming the device settings to ensure proper function after the medication has been administered. |
46 | $62 | $452 |
| Hospital follow-up visit, moderate complexity Follow-up hospital visit for an existing patient involving moderate medical decision making. The visit requires at least 35 minutes of time spent on the date of service. |
45 | $58 | $202 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
37 | $51 | $205 |
| Atrial fibrillation ablation with pulmonary vein isolation A procedure to treat atrial fibrillation by mapping the heart's electrical activity and destroying tissue causing irregular contractions. This is done by isolating the pulmonary veins using catheter-based destruction. |
35 | $710 | $3,196 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
32 | $108 | $456 |
| 3D ultrasound of heart for congenital heart defects This procedure uses three-dimensional ultrasound imaging to evaluate the structure of the heart during an assessment for congenital heart defects. |
29 | $18 | $70 |
| Removal of subcutaneous heart rhythm monitor This procedure involves the removal of a heart rhythm monitor that has been implanted under the skin. It is a minor surgical intervention to extract the device. |
25 | $36 | $250 |
| Repair of left upper heart chamber with implant A surgical procedure to repair the left upper chamber of the heart using an implanted device, with review by a radiologist. |
25 | $559 | $2,372 |
| Pacemaker insertion with heart chamber electrodes A surgical procedure to implant a pacemaker device and place electrodes into the upper and lower chambers of the heart to regulate heart rhythm. |
24 | $360 | $1,480 |
| Programming of multiple lead implantable defibrillator system Adjustment and testing of the settings for an implanted heart device with multiple leads to ensure proper function. |
24 | $75 | $274 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
23 | $58 | $202 |
| Programming of dual lead implantable defibrillator system Adjustment and testing of the settings for an implanted heart device with two leads to ensure proper function. |
21 | $65 | $237 |
| Continuous ECG monitoring, up to 30 days Continuous heart rhythm monitoring for up to 30 days, including professional review and reporting of the results. |
19 | $18 | $73 |
| Heart chamber tissue destruction via catheter A procedure that destroys tissue in the upper heart chamber using a tube to treat abnormal heart rhythm. |
19 | $230 | $1,212 |
| Ultrasound of heart blood vessels with radiologist review An ultrasound exam that evaluates blood vessels within the heart, including a review of the results by a radiologist. |
16 | $56 | $418 |
| External shock to heart to regulate heart beat A procedure that delivers an electric shock to the heart from outside the body to restore a normal heart rhythm. |
15 | $80 | $362 |
| Catheter ablation for abnormal heart rhythm A procedure where catheters are inserted to destroy tissue causing irregular heartbeats. |
14 | $230 | $1,212 |
| Pacemaker system programming Adjustment and testing of a multi-lead pacemaker to ensure proper function and settings. |
13 | $65 | $210 |
| Left heart catheterization with pacing and arrhythmia induction A procedure where catheters are inserted to record electrical activity and pace the left lower chamber of the heart. It also involves intentionally inducing an abnormal heart rhythm for diagnostic purposes. |
12 | $127 | $490 |
| Removal and replacement of dual lead permanent pacemaker This procedure involves removing an existing permanent pacemaker with two leads and replacing it with a new device. It is performed to update or repair the heart rhythm management system. |
11 | $256 | $1,022 |
| Radiofrequency ablation for supraventricular tachycardia A procedure to locate and destroy abnormal heart tissue in the upper chambers of the heart that causes a rapid heart rate. |
11 | $626 | $2,379 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.
29.4% high complexity
5.8% medium
64.8% routine
Industry Payment Transparency
Open Payments through 2024 ↗$18,732
Total received (2018-2024)
Avg $2,676/year across 7 years
Top 5% in TX for internal medicine
10
Companies
80
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$9,373 (50.0%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$6,906 (36.9%)
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$2,453 (13.1%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$56
2023
$456
2022
$344
2021
$299
2020
$1,641
2019
$392
2018
$15,544
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Abbott Laboratories
$10,137
Medtronic Vascular, Inc.
$6,906
Medical Device Business Services, Inc.
$557
Biosense Webster, Inc.
$525
Medtronic, Inc.
$161
BOSTON SCIENTIFIC CORPORATION
$146
Boston Scientific Corporation
$117
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$106
CARDIVA MEDICAL, INC.
$56
E.R. Squibb & Sons, L.L.C.
$19
Top 3 companies account for 94.0% of total payments
Associated products mentioned in payments ›
AMPLATZER AMULET · AVEIR · Accent Pacemaker · Asahi Fielder coronary guide wire · Assurity Pacemaker · Azure · CARDIVA VASCADE 6/7F VCS · CARDIVA VASCADE MVP VVCS 6-12F · CARTO 3 · COBALT DR MRI SURESCAN · CRT-Ds · CRT-Ps · Carto 3 · Carto 3 System · Confirm Rx · ELIQUIS · Ensite Cardiac Mapping System · GENERAL THERAPIES · ICDs · INTELLANAV · LifeVest · MICRA · Micra · PERCLOSE PROGLIDE · Pacemakers · Paso · Perclose ProGlide suture mediated closure system · Quadra Assura CRT Defibrillator · Quartet CRT Lead · Unify Assura CRT Defibrillator · WATCHMAN · WATCHMAN Access System
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
The majority of payments (50%) are consulting fees, which typically reflect recognized clinical expertise sought by manufacturers. Total industry engagement is in the top 5% for internal medicine in TX.
Equivalent to $422 per 100 Medicare services performed
Geographic Context
Internal medicine physicians within 10 mi
1,164
Per 100K population
57.1
County median income
$70,571
Nearest hospital
BAPTIST NEIGHBORHOOD HOSPITAL THOUSAND OAKS
4.8 mi
4.8 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This measures how much public data is available about a provider — not how good they are. How we calculate this →
Summary
Dr. May is a remote & electrophysiology specialist, with above-average Medicare volume (top 8% in TX), with consulting-driven industry engagement in the top 5% of TX peers, with 18 years of NPI registration.
This summary is auto-generated from federal data. It describes data availability and patterns — not clinical quality. Read our methodology →
Frequently Asked Questions
Is Dr. May experienced with remote cardiac rhythm monitor evaluation, up to 30 days?
Based on Medicare claims data, Dr. May performed 1,183 remote cardiac rhythm monitor evaluation, up to 30 days services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. May receive payments from pharmaceutical companies?
Yes. Dr. May received a total of $18,732 from 10 companies across 80 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. May's costs compare to other internal medicine physicians in San Antonio?
Dr. May's average Medicare payment per service is $44. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. May) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
Explore related providers
Same specialty & city
Internal Medicine Physicians in San Antonio
Browse internal medicine physicians in San Antonio ranked by procedure volume and transparency data.
Highest volume
Top Internal Medicine Physicians in TX
Internal medicine physicians ranked by total Medicare services performed statewide.
Industry payments
Pharma Payments to Internal Medicine Physicians in TX
Which TX internal medicine physicians receive the most from drug and device companies.
By company
Abbott Laboratories Payments to Doctors
See all physicians who received payments from Abbott Laboratories.
By company
Medtronic Vascular, Inc. Payments to Doctors
See all physicians who received payments from Medtronic Vascular, Inc.
By company
Medical Device Business Services, Inc. Payments to Doctors
See all physicians who received payments from Medical Device Business Services, Inc.
About this page
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. The Transparency Score measures data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology