John Masou Ellison, M.D.
NPI 1093845943ActiveIndividual· Emergency Medicine· Monterey, CA
Emergency Medicine (M.D.) in Monterey, California, trained at University of California, San Diego School of Medicine (class of 1990). 525 Medicare patients in 2024, $68,779 paid; nearly all of their 265 Part D prescriptions were generic (97%).
Overview
| NPI | 1093845943 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Mar 7, 2007 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | G79299 | 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 - Emergency Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 525 |
|---|---|
| Services billed | 830 across 29 procedure codes |
| Paid by Medicare | $68,779 |
Part D prescriptions in 2024
| Prescriptions (claims) | 265 · 279 30-day fills |
|---|---|
| Patients | 152 |
| Total drug cost | $4,523 |
| Generic share | 97% of claims |
Education and affiliations
| Medical school | University of California, San Diego School of Medicine |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Emergency Medicine |
Medical groups
- Community Hospital of the Monterey PeninsulaMonterey, CA · 146 clinicians
- Monterey Bay Observation MedicineMonterey, CA · 34 clinicians
Hospital affiliation
- Community Hospital of the Monterey PeninsulaMonterey, 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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