Alison Alderdice, PSYD
NPI 1487199584ActiveIndividual· Psychologist· Petaluma, CA
Opted out of Medicare from August 2022 to August 2028. Psychologist (PSYD) in Petaluma, California, licensed in CA, with an NPI issued in December 2016.
Overview
| NPI | 1487199584 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PSYD |
| Sole proprietor | No |
| NPI issued | Dec 27, 2016 |
| Last updated in NPPES | Sep 15, 2026 |
| Certified by provider | Sep 15, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychologist Primary | 103T00000X | 28838 | 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) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Opt-out | Opted out Aug 25, 2022 – Aug 25, 2028 |
| Can order and refer | No |
During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.
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