Gregg Gordon Gerasimon, MD
NPI 1265592570ActiveIndividual· Internal Medicine, Clinical Cardiac Electrophysiology· San Antonio, TX
Internal Medicine, Clinical Cardiac Electrophysiology (MD) in San Antonio, Texas, trained at Georgetown University School of Medicine (class of 1999). In 2024 Medicare paid $229,085 for 1,187 patients, and Part D covered 590 of their prescriptions, 77% of them generic. Amgen Inc. was the largest of 8 companies reporting payments in 2025, $413.11 in all, mostly food and beverage.
Overview
| NPI | 1265592570 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Dec 11, 2006 |
| Last updated in NPPES | May 2, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Clinical Cardiac Electrophysiology Primary | 207RC0001X | P8585 | TX |
| Internal Medicine, Cardiovascular Disease | 207RC0000X | P8585 | TX |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Cardiovascular Disease (Cardiology) (MT); Practitioner - Cardiac Electrophysiology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,187 |
|---|---|
| Services billed | 4,600 across 67 procedure codes |
| Paid by Medicare | $229,085 |
Part D prescriptions in 2024
| Prescriptions (claims) | 590 · 1,289 30-day fills |
|---|---|
| Patients | 145 |
| Total drug cost | $172,434 |
| Generic share | 77% of claims |
Education and affiliations
| Medical school | Georgetown University School of Medicine |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
| Secondary specialties | Cardiac Electrophysiology |
Medical group
- Rchp Billings - Missoula LLCMissoula, MT · 69 clinicians
Hospital affiliations
- Clark Fork Valley HospitalPlains, MT
- Community Medical CenterMissoula, MT
- Deer Lodge Medical CenterDeer Lodge, MT
- Methodist HospitalSan Antonio, TX
- Methodist Hospital Stone OakSan Antonio, TX
Industry payments (Open Payments)
- 2025$413.11 · 15 payments from 8 companies
- 2024$920.66 · 26 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $124.98 | 1 |
| Boston Scientific Corporation | $107.50 | 5 |
| Pfizer Inc. | $51.11 | 3 |
| Biosense Webster, Inc. | $33.54 | 2 |
| Novo Nordisk Inc | $25.99 | 1 |
What the 2025 payments were for
- Food and Beverage$413.11 · 15 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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