Grant Roger Masaoka, M.D.
NPI 1780677120ActiveIndividual· Specialist· Anaheim, CA
Specialist (M.D.) in Anaheim, California, licensed in CA, with an NPI issued in August 2005. Part D covered 16 prescriptions written in 2024, 81% of them generic. Merck Sharp & Dohme LLC reported $124.99 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1780677120 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 30, 2005 |
| Last updated in NPPES | Jul 13, 2026 |
| Reactivated | Mar 29, 2006 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | G19094 | 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) | Not in the public enrollment file of Oct 1, 2026 |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 16 · 44 30-day fills |
|---|---|
| Total drug cost | $662.83 |
| Generic share | 81% of claims |
Industry payments (Open Payments)
- 2025$124.99 · 1 payment from 1 company
- 2024$33.52 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $124.99 | 1 |
What the 2025 payments were for
- Food and Beverage$124.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 100 Specialist providers in Anaheim · All Specialist providers in California