Peter Barmon Brett, M.D.
NPI 1487743472ActiveIndividual· Internal Medicine, Hematology & Oncology· Santa Rosa, CA
Internal Medicine, Hematology & Oncology (M.D.) in Santa Rosa, California, trained at Stanford University School of Medicine (class of 1985). Mostly services rather than prescriptions: Medicare paid $14,490 for 82 patients in 2024, with only 24 Part D claims.
Overview
| NPI | 1487743472 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 11, 2006 |
| Last updated in NPPES | Mar 7, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | G59321 | CA |
| Internal Medicine, Medical Oncology | 207RX0202X | G59321 | CA |
| Internal Medicine, Hematology | 207RH0000X | G59321 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hematology/Oncology (MP) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 82 |
|---|---|
| Services billed | 162 across 9 procedure codes |
| Paid by Medicare | $14,490 |
Part D prescriptions in 2024
| Prescriptions (claims) | 24 · 24 30-day fills |
|---|---|
| Total drug cost | $665.76 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | Stanford University School of Medicine |
|---|---|
| Graduation year | 1985 |
| Medicare specialty | Hematology/Oncology |
Medical group
- Commonwealth Healthcare CorporationSaipan, MP · 79 clinicians
Hospital affiliation
- Commonwealth Health CenterGarapan, MP
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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