Brett Aaron Stark, MD
Reproductive Endocrinology Physician · San Francisco, CA
Brett Aaron Stark, MD is a reproductive endocrinology physician with a practice address in San Francisco, California, and NPI 1831693779, issued on Mar 23, 2018. Check the license (California A166780, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Brett Aaron Stark
- Credential
- MD
- Primary taxonomy
- Reproductive Endocrinology Physician 207VE0102X
- License number
- A166780 CA
Self-reported in NPPES; status is on the state search - Practice location
- 499 Illinois St FL 6, San Francisco, CA 94158
- Phone
- (415) 353-7475
- Enumerated
- Mar 23, 2018
- Record last updated
- Aug 5, 2022
- Fax
- (415) 353-7744
- Entity
- Type 1 · individual
8 nearest reproductive endocrinology physician records → All 267 in California → Look up another NPI →
Also registered at 499 Illinois St FL 6
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Allison Altman, PHDClinical Psychologist1346063682
- Ronley AvilesFamily Nurse Practitioner1619507050
- Natalie Barnes, FNP-BCFamily Nurse Practitioner1134732704
- Marcelle Cedars, M.D.Reproductive Endocrinology Physician1427095090
- Jacob Christ, MDReproductive Endocrinology Physician1386141422
- Elena Hogenesch, MDObstetrics & Gynecology Physician1518595347
Verify Brett Aaron Stark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A166780Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 74.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $856.19
3 payments; by number, the most common kind was travel and lodging; the largest payer was Ferring Pharmaceuticals Inc. The 1,066 providers of this specialty with any payment received $1,086.52 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Brett Aaron Stark among 267 reproductive endocrinology physician records in California
Brett Aaron Stark, MD is one of 267 reproductive endocrinology physician records with a practice address in California. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 95% of them.
- NPI issued2018 · 95% of these records are older, 2% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 10% of these records are
- Record last updated2022 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VE0102X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Reproductive Endocrinology Physician providers in California
There are 267 reproductive endocrinology physician records in California.
All 267 in California → Every provider in San Francisco → Reproductive Endocrinology Physician nationwide →
The 8 reproductive endocrinology physician records with the nearest ZIP codes
- Marcelle Cedars, M.D.San Francisco, CA 941581427095090
- Jacob Christ, MDSan Francisco, CA 941581386141422
- David Huang, M.D.San Francisco, CA 941581205367729
- Evelyn Mok-Lin, M.D.San Francisco, CA 941581255470746
- Martha Noel, M.D.San Francisco, CA 941581801020359
- Kaia Schwartz, MDSan Francisco, CA 941581225590094
- Alisha Tolani, M.D.San Francisco, CA 941581730615014
- Kajal VermaSan Francisco, CA 941581407315468
Common questions
What is Brett Aaron Stark, MD's NPI number?
Brett Aaron Stark, MD's National Provider Identifier (NPI) is 1831693779, issued on Mar 23, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Brett Aaron Stark, MD located?
The NPPES record lists a practice address at 499 Illinois St FL 6, San Francisco, CA, 94158. Phone: (415) 353-7475. Providers update this record themselves, so call before visiting.
How can I verify Brett Aaron Stark, MD's license?
NPPES lists California license number A166780, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Brett Aaron Stark, MD's MIPS final score?
The 2023 MIPS final score is 74.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.