Roy Koga, M.D.
NPI 1164511309ActiveIndividual· Family Medicine· Hilo, HI
Family Medicine (M.D.) in Hilo, Hawaii, trained at University of Washington School of Medicine (class of 1973). Their prescriptions cost Medicare Part D more than their services did: $989,990 for 5,928 claims, against $22,379 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 8 companies reporting payments in 2025, $1,138 in all, mostly food and beverage.
Overview
| NPI | 1164511309 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Oct 12, 2006 |
| Last updated in NPPES | Sep 1, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | MD2816 | HI |
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 - General Practice (HI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 142 |
|---|---|
| Services billed | 376 across 7 procedure codes |
| Paid by Medicare | $22,379 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,928 · 12,994 30-day fills |
|---|---|
| Patients | 409 |
| Total drug cost | $989,990 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | University of Washington School of Medicine |
|---|---|
| Graduation year | 1973 |
| Medicare specialty | General Practice |
| Telehealth | Offers telehealth |
Other facilities
- Bayada Home Health CareHome health agency · Hilo, HI
- DBA Hawai'I Care ChoicesHospice · Hilo, HI
Industry payments (Open Payments)
- 2025$1,138 · 41 payments from 8 companies
- 2024$1,705 · 71 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $492.42 | 25 |
| Novo Nordisk Inc | $202.58 | 3 |
| Amgen Inc. | $150.22 | 3 |
| Lilly USA, LLC | $129.56 | 2 |
| Bayer Healthcare Pharmaceuticals Inc. | $74.62 | 3 |
What the 2025 payments were for
- Food and Beverage$1,138 · 41 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 73 family medicine physicians in Hilo · All family medicine physicians in Hawaii