Thomas Rey Yamamoto, MD
NPI 1083633457ActiveIndividual· Obstetrics & Gynecology· Arcadia, CA
Obstetrics & Gynecology (MD) in Arcadia, California, trained at University of California, San Diego School of Medicine (class of 1988). Their prescriptions cost Medicare Part D more than their services did: $3,633 for 90 claims, against $2,403 paid for services in 2024.
Overview
| NPI | 1083633457 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 18, 2006 |
| Last updated in NPPES | Mar 27, 2026 |
| Certified by provider | Mar 27, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | G66872 | 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 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 - Obstetrics/Gynecology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 21 |
|---|---|
| Services billed | 33 across 10 procedure codes |
| Paid by Medicare | $2,403 |
Part D prescriptions in 2024
| Prescriptions (claims) | 90 · 142 30-day fills |
|---|---|
| Patients | 36 |
| Total drug cost | $3,633 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | University of California, San Diego School of Medicine |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | Obstetrics/Gynecology |
Medical group
- Healthcare Partners Affiliates Medical GroupAnaheim, CA · 754 clinicians
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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