David Warren Yamamoto, M.D.
NPI 1679642136ActiveIndividual· Family Medicine· Arvada, CO
Family Medicine (M.D.) in Arvada, Colorado, trained at University of Washington School of Medicine (class of 1977). Their prescriptions cost Medicare Part D more than their services did: $355,319 for 2,851 claims, against $14,964 paid for services in 2024. Lilly USA, LLC was the largest of 3 companies reporting payments in 2025, $85.70 in all, mostly food and beverage.
Overview
| NPI | 1679642136 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Nov 7, 2006 |
| Last updated in NPPES | May 12, 2026 |
| Certified by provider | May 12, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 23821 | CO |
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 - Family Practice (CO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 40 |
|---|---|
| Services billed | 246 across 17 procedure codes |
| Paid by Medicare | $14,964 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,851 · 6,353 30-day fills |
|---|---|
| Patients | 176 |
| Total drug cost | $355,319 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | University of Washington School of Medicine |
|---|---|
| Graduation year | 1977 |
| Medicare specialty | Family Practice |
Industry payments (Open Payments)
- 2025$85.70 · 4 payments from 3 companies
- 2024$23.80 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $37.21 | 2 |
| Bausch Health US, LLC | $24.33 | 1 |
| Medtronic, Inc. | $24.16 | 1 |
What the 2025 payments were for
- Food and Beverage$85.70 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 53 family medicine physicians in Arvada · All family medicine physicians in Colorado