Ralph A. Defronzo, MD
NPI 1851408843ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· San Antonio, TX
Internal Medicine, Endocrinology, Diabetes & Metabolism (MD) in San Antonio, Texas, licensed in TX, with an NPI issued in August 2006. Enrolled in Medicare as practitioner - endocrinology. Corcept Therapeutics was the largest of 8 companies reporting payments in 2025, $112,578 in all, mostly consulting fees.
Overview
| NPI | 1851408843 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 24, 2006 |
| Last updated in NPPES | May 2, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | H7531 | 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 - Endocrinology (TX) |
|---|
Industry payments (Open Payments)
- 2025$112,578 · 62 payments from 8 companies
- 2024$142,981 · 71 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Corcept Therapeutics | $47,124 | 23 |
| Regeneron Pharmaceuticals, Inc. | $32,430 | 19 |
| Novo Nordisk Inc | $15,543 | 10 |
| Glaxosmithkline, LLC. | $7,150 | 2 |
| Novo Nordisk As | $4,220 | 4 |
What the 2025 payments were for
- Consulting Fee$58,850 · 25 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$33,000 · 6 payments
- Travel and Lodging$16,674 · 20 payments
- Honoraria$3,120 · 2 payments
- Food and Beverage$934.79 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Endocrinology, Diabetes & Metabolism providers in San Antonio
- 1356951735
- 1134393432
- 1437328481
- 1275658585
- 1427166305
- 1083536130
- 1366581589
- 1861701963
- 1003241837
- 1518154400
- 1447599949
- 1255502639
All Internal Medicine, Endocrinology, Diabetes & Metabolism providers in Texas →