Mary Antionette Fitzsimons, M.D
NPI 1053330431ActiveIndividual· Emergency Medicine· Antioch, CA
Emergency Medicine (M.D) in Antioch, California, trained at Northwestern University Feinberg Medical School (class of 1981). 470 Medicare patients in 2024, $77,140 paid; nearly all of their 403 Part D prescriptions were generic (93%).
Overview
| NPI | 1053330431 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D |
| Sole proprietor | No |
| NPI issued | Jul 18, 2006 |
| Last updated in NPPES | Oct 24, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | G56339 | CA |
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 (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 470 |
|---|---|
| Services billed | 809 across 29 procedure codes |
| Paid by Medicare | $77,140 |
Part D prescriptions in 2024
| Prescriptions (claims) | 403 · 408 30-day fills |
|---|---|
| Patients | 222 |
| Total drug cost | $8,138 |
| Generic share | 93% of claims |
Education and affiliations
| Medical school | Northwestern University Feinberg Medical School |
|---|---|
| Graduation year | 1981 |
| Medicare specialty | Emergency Medicine |
Medical group
- Cep America - CaliforniaPomona, CA · 1,292 clinicians
Hospital affiliation
- Sutter Delta Medical CenterAntioch, 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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