Maria Villarosa, MD
NPI 1861540759 · Psychiatry Physician · Riverside, CA
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maria Villarosa, MD is a Psychiatry Physician provider in Riverside, CA (NPI 1861540759).
Provider details
- NPI number
- 1861540759
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A73377 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 81 | 21 |
| Quetiapine Fumarate | 59 | 14 |
| Lamotrigine | 47 | 11 |
| Divalproex Sodium | 40 | — |
| Mirtazapine | 34 | — |
| Fluoxetine Hcl | 33 | 11 |
| Olanzapine | 29 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-08
- Last updated
- 2021-12-01
Frequently asked questions
- What is Maria Villarosa's NPI number?
- Maria Villarosa's National Provider Identifier (NPI) is 1861540759, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maria Villarosa's specialty?
- Maria Villarosa is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Maria Villarosa located?
- Maria Villarosa's practice location on file with NPPES is 10800 Magnolia Ave, Riverside, CA 92505-3043.
- What is Maria Villarosa's phone number?
- The practice phone number listed in the NPPES registry for Maria Villarosa is (909) 353-2000.
- Does Maria Villarosa accept Medicare?
- Maria Villarosa is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maria Villarosa's NPI active?
- Yes — Maria Villarosa's NPI (1861540759) is active in the NPPES registry as of the last update on 2021-12-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.