Andrea Harzstark, MD
NPI 1871766576 · Hematology & Oncology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Andrea Harzstark, MD is a Hematology & Oncology Physician provider in San Francisco, CA (NPI 1871766576).
Provider details
- NPI number
- 1871766576
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A86175 (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
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 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Abiraterone Acetate | 219 | 53 |
| Prednisone | 178 | 59 |
| Darolutamidebrand: Nubeqa | 84 | 13 |
| Alendronate Sodium | 43 | 13 |
| Enzalutamidebrand: Xtandi | 38 | — |
| Dexamethasone | 31 | 15 |
| Bicalutamide | 29 | 18 |
| Hydrocodone/Acetaminophen |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-04-02
- Last updated
- 2021-12-15
Frequently asked questions
- What is Andrea Harzstark's NPI number?
- Andrea Harzstark's National Provider Identifier (NPI) is 1871766576, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Andrea Harzstark's specialty?
- Andrea Harzstark is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Andrea Harzstark located?
- Andrea Harzstark's practice location on file with NPPES is 1600 Divisadero St, San Francisco, CA 94143-3010.
- What is Andrea Harzstark's phone number?
- The practice phone number listed in the NPPES registry for Andrea Harzstark is (415) 353-7171.
- Does Andrea Harzstark accept Medicare?
- Andrea Harzstark is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Andrea Harzstark's NPI active?
- Yes — Andrea Harzstark's NPI (1871766576) is active in the NPPES registry as of the last update on 2021-12-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.