Regina Maria Santiago, MD
NPI 1548793649 · Psychiatry Physician · Olympia, WA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Regina Maria Santiago, MD is a Psychiatry Physician provider in Olympia, WA (NPI 1548793649).
Provider details
- NPI number
- 1548793649
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- MD61156264 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
209 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 131 | $116 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 51 | $77 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 14 | $110 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 13 | $167 |
Typical Medicare-allowed amounts for these services range $77–$167 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 38 | 22 |
| Atorvastatin Calcium | 22 | 11 |
| Prazosin Hcl | 21 | — |
| Quetiapine Fumarate | 21 | — |
| Olanzapine | 20 | — |
| Pantoprazole Sodium | 20 | — |
| Hydroxyzine Hcl | 18 | 12 |
Practice location
Mailing address
Additional practice locations (1)
- 4800 College St SeLacey, WA 98503-4389Phone: (360) 493-7060Fax: (360) 493-7562
Registry dates
- Enumerated
- 2017-04-05
- Last updated
- 2025-01-16
- Certified
- 2025-01-16
Frequently asked questions
- What is Regina Maria Santiago's NPI number?
- Regina Maria Santiago's National Provider Identifier (NPI) is 1548793649, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Regina Maria Santiago's specialty?
- Regina Maria Santiago is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Regina Maria Santiago located?
- Regina Maria Santiago's practice location on file with NPPES is 413 Lilly Rd Ne, Olympia, WA 98506-5133.
- What is Regina Maria Santiago's phone number?
- The practice phone number listed in the NPPES registry for Regina Maria Santiago is (360) 493-7060.
- Does Regina Maria Santiago accept Medicare?
- Regina Maria Santiago is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Regina Maria Santiago's NPI active?
- Yes — Regina Maria Santiago's NPI (1548793649) is active in the NPPES registry as of the last update on 2025-01-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.