Gervacio D. Diaz III, M.D.
NPI 1700835451ActiveIndividual· Internal Medicine· Modesto, CA
Internal Medicine (M.D.) with Sutter Valley Medical Foundation, practicing in Modesto, California. Their prescriptions cost Medicare Part D more than their services did: $1,448,471 for 13,392 claims, against $67,397 paid for services in 2024. Boehringer Ingelheim Pharmaceuticals, Inc. was the largest of 15 companies reporting payments in 2025, $835.54 in all, mostly food and beverage. Lists Doctors Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1700835451 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | May 9, 2006 |
| Last updated in NPPES | Mar 13, 2023 |
| Certified by provider | Mar 13, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A69801 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 216 |
|---|---|
| Services billed | 1,252 across 23 procedure codes |
| Paid by Medicare | $67,397 |
Part D prescriptions in 2024
| Prescriptions (claims) | 13,392 · 31,069 30-day fills |
|---|---|
| Patients | 677 |
| Total drug cost | $1,448,471 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 1988 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Sutter Valley Medical FoundationModesto, CA · 2,500 clinicians
Hospital affiliations
- Doctors Medical CenterModesto, CA
- Memorial Medical CenterModesto, CA
Other facilities
- Careone Home Health and Hospice, IncHome health agency · Salida, CA
- Lifeguard Home HealthHome health agency · Pleasanton, CA
- Sutter Care at HomeHome health agency · Salida, CA
Industry payments (Open Payments)
- 2025$835.54 · 38 payments from 15 companies
- 2024$1,005 · 57 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. | $168.85 | 7 |
| Glaxosmithkline, LLC. | $156.76 | 10 |
| Amgen Inc. | $97.69 | 4 |
| Exact Sciences Corporation | $55.45 | 2 |
| Novo Nordisk Inc | $48.10 | 2 |
What the 2025 payments were for
- Food and Beverage$835.54 · 38 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other internal medicine physicians in Modesto
- 1053730911
- 1063832483
- 1134175540
- 1154852994
- 1154973584
- 1164794673
- 1184612624
- 1255824884
- 1306990817
- 1326069246
- 1336136548
- 1336438852
All 169 internal medicine physicians in Modesto · All internal medicine physicians in California