Ann Mary Belek, MD
NPI 1780841197 · Rheumatology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ann Mary Belek, MD is a Rheumatology Physician provider in San Francisco, CA (NPI 1780841197).
Provider details
- NPI number
- 1780841197
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A103125 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 494 | 178 |
| Methotrexate Sodiumbrand: Methotrexate | 310 | 128 |
| Hydroxychloroquine Sulfate | 286 | 116 |
| Methotrexate/Pfbrand: Rasuvo | 140 | 24 |
| Alendronate Sodium | 114 | 56 |
| Meloxicam | 87 | 45 |
| Etanerceptbrand: Enbrel Sureclick | 76 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-05-22
- Last updated
- 2021-12-27
Frequently asked questions
- What is Ann Mary Belek's NPI number?
- Ann Mary Belek's National Provider Identifier (NPI) is 1780841197, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ann Mary Belek's specialty?
- Ann Mary Belek is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Ann Mary Belek located?
- Ann Mary Belek's practice location on file with NPPES is 505 Parnassus Ave, San Francisco, CA 94143-2204.
- What is Ann Mary Belek's phone number?
- The practice phone number listed in the NPPES registry for Ann Mary Belek is (415) 476-1528.
- Does Ann Mary Belek accept Medicare?
- Ann Mary Belek is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ann Mary Belek's NPI active?
- Yes — Ann Mary Belek's NPI (1780841197) is active in the NPPES registry as of the last update on 2021-12-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.