Stacy Fang, M.D.
NPI 1558763250 · Obstetrics & Gynecology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stacy Fang, M.D. is a Obstetrics & Gynecology Physician provider in San Francisco, CA (NPI 1558763250).
Provider details
- NPI number
- 1558763250
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A140045 (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
11 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
4 documented practice locations
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 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Estradiol | 40 | 25 |
| Estradiolbrand: Estring | 21 | — |
| Estradiolbrand: Yuvafem | 16 | — |
| Progesterone, Micronizedbrand: Progesterone | 14 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (3)
- 1375 Sutter St Ste 308San Francisco, CA 94109-5466Phone: (415) 750-7050Fax: (415) 369-1388
- 1580 Valencia St Ste 802San Francisco, CA 94110-4415Phone: (415) 750-7050Fax: (415) 369-1388
- 1000 W Carson St # 3Torrance, CA 90502-2004Phone: (310) 222-3886Fax: (310) 782-8148
Registry dates
- Enumerated
- 2014-09-24
- Last updated
- 2021-12-17
Frequently asked questions
- What is Stacy Fang's NPI number?
- Stacy Fang's National Provider Identifier (NPI) is 1558763250, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stacy Fang's specialty?
- Stacy Fang is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Stacy Fang located?
- Stacy Fang's practice location on file with NPPES is 1100 Van Ness Ave, San Francisco, CA 94109-6978.
- What is Stacy Fang's phone number?
- The practice phone number listed in the NPPES registry for Stacy Fang is (415) 750-7050.
- Does Stacy Fang accept Medicare?
- Stacy Fang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stacy Fang's NPI active?
- Yes — Stacy Fang's NPI (1558763250) is active in the NPPES registry as of the last update on 2021-12-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.