Bret Nicholas Namihas, M.D.
NPI 1215949722ActiveIndividual· Internal Medicine, Gastroenterology· Redding, CA
Internal Medicine, Gastroenterology (M.D.) with Southern California Permanente Medical Group and 1 other group, practicing in Redding, California. In 2024 Medicare paid $57,972 for 306 patients, and Part D covered 239 of their prescriptions, 72% of them generic. Abbvie Inc. was the largest of 2 companies reporting payments in 2025, $179.50 in all, mostly food and beverage. Lists Hazel Hawkins Memorial Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1215949722 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Aug 13, 2006 |
| Last updated in NPPES | Dec 23, 2025 |
| Certified by provider | Dec 23, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | G58791 | CA |
| Specialist | 174400000X | 00G587910 | 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 - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 306 |
|---|---|
| Services billed | 427 across 28 procedure codes |
| Paid by Medicare | $57,972 |
Part D prescriptions in 2024
| Prescriptions (claims) | 239 · 341 30-day fills |
|---|---|
| Patients | 189 |
| Total drug cost | $25,314 |
| Generic share | 72% of claims |
Education and affiliations
| Graduation year | 1987 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical groups
- Southern California Permanente Medical GroupRedlands, CA · 11,293 clinicians
- Hazel Hawkins Memorial HospitalHollister, CA · 52 clinicians
Hospital affiliations
- Hazel Hawkins Memorial HospitalHollister, CA
- Mercy Medical Center ReddingRedding, CA
Industry payments (Open Payments)
- 2025$179.50 · 8 payments from 2 companies
- 2024$36.96 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $124.75 | 6 |
| Ipsen Biopharmaceuticals, Inc | $54.75 | 2 |
What the 2025 payments were for
- Food and Beverage$179.50 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 16 gastroenterologists in Redding · All gastroenterologists in California