Regina Maria San Pedro Santiago, MD
NPI 1548793649ActiveIndividual· Psychiatry & Neurology, Psychiatry· Olympia, WA
Psychiatry & Neurology, Psychiatry (MD) with Providence Health and Services Washington, practicing in Olympia, Washington. 42 Medicare patients in 2024, $20,084 paid; nearly all of their 509 Part D prescriptions were generic (97%). Lists Providence St Peter Hospital as a hospital affiliation.
Overview
| NPI | 1548793649 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 5, 2017 |
| Last updated in NPPES | Jan 16, 2025 |
| Certified by provider | Jan 16, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | MD61156264 | WA |
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 - Psychiatry (WA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 42 |
|---|---|
| Services billed | 229 across 8 procedure codes |
| Paid by Medicare | $20,084 |
Part D prescriptions in 2024
| Prescriptions (claims) | 509 · 528 30-day fills |
|---|---|
| Patients | 54 |
| Total drug cost | $14,238 |
| Generic share | 97% of claims |
Education and affiliations
| Graduation year | 2012 |
|---|---|
| Medicare specialty | Psychiatry |
Medical group
- Providence Health and Services WashingtonOlympia, WA · 475 clinicians
Hospital affiliation
- Providence St Peter HospitalOlympia, WA
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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All 33 psychiatrists in Olympia · All psychiatrists in Washington