Gary Thomas Underhill, MD
NPI 1851375265ActiveIndividual· Family Medicine· Dayton, WA
Family Medicine (MD) in Dayton, Washington, trained at Loma Linda University School of Medicine (class of 1996). 211 Medicare patients in 2024, $28,534 paid; nearly all of their 208 Part D prescriptions were generic (94%).
Overview
| NPI | 1851375265 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 30, 2005 |
| Last updated in NPPES | Mar 3, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | MD00037711 | WA |
| Emergency Medicine | 207P00000X | MD00037711 | WA |
| Emergency Medicine | 207P00000X | MD0037711 | WA |
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 - Emergency Medicine (WA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 211 |
|---|---|
| Services billed | 363 across 16 procedure codes |
| Paid by Medicare | $28,534 |
Part D prescriptions in 2024
| Prescriptions (claims) | 208 · 213 30-day fills |
|---|---|
| Patients | 116 |
| Total drug cost | $3,887 |
| Generic share | 94% of claims |
Education and affiliations
| Medical school | Loma Linda University School of Medicine |
|---|---|
| Graduation year | 1996 |
| Medicare specialty | Emergency Medicine |
Medical group
- Columbia County Hospital DistrictDayton, WA · 51 clinicians
Hospital affiliations
- Dayton General HospitalDayton, WA
- Trios HealthKennewick, WA
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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