Gregg Alan Ellison, MD
NPI 1073573168ActiveIndividual· Internal Medicine· Templeton, CA
Internal Medicine (MD) in Templeton, California, trained at Baylor College of Medicine (class of 1977). Their prescriptions cost Medicare Part D more than their services did: $307,142 for 3,186 claims, against $89,638 paid for services in 2024.
Overview
| NPI | 1073573168 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Mar 24, 2006 |
| Last updated in NPPES | Feb 25, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A33338 | CA |
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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 256 |
|---|---|
| Services billed | 1,498 across 33 procedure codes |
| Paid by Medicare | $89,638 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,186 · 8,081 30-day fills |
|---|---|
| Patients | 240 |
| Total drug cost | $307,142 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | Baylor College of Medicine |
|---|---|
| Graduation year | 1977 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- David B. HammerTempleton, CA · 123 clinicians
Hospital affiliations
- Adventist Health Sierra VistaSan Luis Obispo, CA
- Adventist Health Twin CitiesTempleton, CA
- French Hospital Medical CenterSan Luis Obispo, CA
Other facilities
- Central Coast Home Health IncHome health agency · San Luis Obispo, CA
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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