Donald Rex Simpson, M.D., PH.D.
NPI 1699053397ActiveIndividual· Specialist· Northridge, CA
Specialist (M.D., PH.D.) in Northridge, California, licensed in CA, with an NPI issued in July 2011. Enrolled in Medicare as practitioner - pathology.
Overview
| NPI | 1699053397 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., PH.D. |
| Sole proprietor | No |
| NPI issued | Jul 28, 2011 |
| Last updated in NPPES | Jul 28, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | G44436 | CA |
| Pathology, Cytopathology | 207ZC0500X | G44436 | CA |
| Pathology, Anatomic Pathology & Clinical Pathology | 207ZP0102X | G44436 | 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 - Pathology (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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