Dr. John Gresham, M.D.
What this data tells you about Dr. Gresham
Dr. John Gresham is an interventional cardiology in San Antonio, TX, with 18 years in practice. Based on federal Medicare data, Dr. Gresham performed 5,256 Medicare services across 3,168 unique beneficiaries.
Between the years covered by Open Payments, Dr. Gresham received a total of $9,986 from 49 pharmaceutical and/or device companies across 456 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in interventional cardiology. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Gresham 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.
Medicare Practice Summary
Medicare Utilization ↗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 |
|---|---|---|---|
| Office visit, established patient (30-39 min) | 1,646 | $91 | $216 |
| Electrocardiogram (EKG), 12-lead | 699 | $10 | $35 |
| Hospital follow-up visit, moderate complexity | 535 | $62 | $150 |
| Echocardiogram, transthoracic | 489 | $146 | $398 |
| Regadenoson injection (Lexiscan) for heart stress test | 436 | $42 | $300 |
| EKG interpretation and report | 303 | $6 | $25 |
| Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional | 139 | $17 | $46 |
| Technetium tc-99m tetrofosmin, diagnostic, per study dose | 114 | $56 | $542 |
| Nuclear medicine studies of heart muscle at rest and with stress and spect | 95 | $329 | $911 |
| New patient office visit (45-59 min) | 95 | $115 | $357 |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision and review by physician | 90 | $54 | $140 |
| Office visit, established patient (20-29 min) | 88 | $61 | $206 |
| Initial hospital admission, high complexity | 77 | $136 | $465 |
| Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes | 67 | $10 | $87 |
| Ultrasound study of arm or leg veins with compression and maneuvers | 62 | $133 | $375 |
| Ultrasound of leg arteries or artery grafts | 55 | $183 | $493 |
| Ultrasound study of one arm or leg veins with compression and maneuvers | 55 | $88 | $235 |
| Cardiac catheterization | 42 | $220 | $960 |
| Destruction of first incompetent vein of arm or leg using radiofrequency and imaging guidance | 28 | $834 | $2,758 |
| Electrocardiogram (ecg) 2-day continuous with review and report by health care professional | 22 | $47 | $172 |
| Evaluation of single, dual, multiple lead or leadless pacemaker system | 21 | $34 | $86 |
| Emergency department visit, moderate complexity | 20 | $95 | $234 |
| Evaluation of implantable heart and blood vessel monitoring system, remote up to 30 days | 19 | $18 | $56 |
| Programming of dual lead pacemaker system | 16 | $60 | $127 |
| Ultrasound of both sides of head and neck blood flow | 16 | $139 | $388 |
| Initial hospital admission, moderate complexity | 16 | $102 | $330 |
| New patient office visit (30-44 min) | 11 | $62 | $249 |
Industry Payment Transparency
Open Payments through 2024 ↗Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2024)
Associated products mentioned in payments ›
Most payments (99%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
0.0 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. Gresham is a clinical cardiology specialist, with above-average Medicare volume (top 11% in TX), and low-engagement industry engagement, with 18 years of practice experience.
This summary is auto-generated from federal data. It describes data availability and patterns — not clinical quality. Read our methodology →
Frequently Asked Questions
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How do Dr. Gresham's costs compare to other interventional cardiologys in San Antonio?
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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.
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