Brett Stark, MD
NPI 1831693779 · Reproductive Endocrinology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brett Stark, MD is a Reproductive Endocrinology Physician provider in San Francisco, CA (NPI 1831693779).
Provider details
- NPI number
- 1831693779
- Entity type
- Individual
- Primary specialty
- Reproductive Endocrinology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
8 yrs in NPPES registry
- Profile completeness33% of score
83% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$856 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1001 Potrero AveSan Francisco, CA 94110-3518Phone: (415) 206-4069
Registry dates
- Enumerated
- 2018-03-23
- Last updated
- 2022-08-05
- Certified
- 2022-08-05
Frequently asked questions
- What is Brett Stark's NPI number?
- Brett Stark's National Provider Identifier (NPI) is 1831693779, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brett Stark's specialty?
- Brett Stark is listed in the NPPES registry with a primary specialty of Reproductive Endocrinology Physician (Allopathic & Osteopathic Physicians).
- Where is Brett Stark located?
- Brett Stark's practice location on file with NPPES is 499 Illinois St Fl 6, San Francisco, CA 94158-2518.
- What is Brett Stark's phone number?
- The practice phone number listed in the NPPES registry for Brett Stark is (415) 353-7475.
- Does Brett Stark accept Medicare?
- Brett Stark is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brett Stark's NPI active?
- Yes — Brett Stark's NPI (1831693779) is active in the NPPES registry as of the last update on 2022-08-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.