David A. Greene, MD
NPI 1104802594ActiveIndividual· Internal Medicine, Geriatric Medicine· Santa Rosa, CA
Internal Medicine, Geriatric Medicine (MD) in Santa Rosa, California, trained at Michigan State University College of Human Medicine (class of 1978). Their prescriptions cost Medicare Part D more than their services did: $146,728 for 1,383 claims, against $29,110 paid for services in 2024. Gilead Sciences, Inc. reported $22.30 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1104802594 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Dec 19, 2005 |
| Last updated in NPPES | Jun 22, 2021 |
| Certified by provider | Jun 22, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Geriatric Medicine Primary | 207RG0300X | C148038 | CA |
| Internal Medicine | 207R00000X | 20639 | KY |
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 - Geriatric Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 98 |
|---|---|
| Services billed | 366 across 5 procedure codes |
| Paid by Medicare | $29,110 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,383 · 2,346 30-day fills |
|---|---|
| Patients | 118 |
| Total drug cost | $146,728 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | Michigan State University College of Human Medicine |
|---|---|
| Graduation year | 1978 |
| Medicare specialty | Geriatric Medicine |
| Secondary specialties | Internal Medicine |
Hospital affiliation
- Providence Santa Rosa Memorial HospitalSanta Rosa, CA
Industry payments (Open Payments)
- 2025$22.30 · 1 payment from 1 company
- 2024$118.86 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gilead Sciences, Inc. | $22.30 | 1 |
What the 2025 payments were for
- Food and Beverage$22.30 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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