DR. BRETT AARON STARK MD
NPI 1831693779
Obstetrics & Gynecology - Reproductive Endocrinology in San Francisco, CA

Q: What is Brett Stark's NPI number?

The NPI number for Brett Stark is 1831693779. It was assigned to this individual provider in the NPPES registry on March 23, 2018. The provider is also known as Brett Aaron Clark Clark.

Q: What is Brett Stark's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Reproductive Endocrinology, with taxonomy code 207VE0102X.

Q: When was this NPI record last updated?

The NPPES record for Brett Stark was last updated on August 5, 2022. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since March 23, 2018PECOS Enrolled

74.46/100

CMS Quality Rating

499 ILLINOIS ST FL 6, SAN FRANCISCO, CA 94158(415) 353-7475(415) 353-7744 Get Directions Write a Review

NPPES record last updated: August 5, 2022. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Aug 5, 2022, Dec 24, 2020, Mar 23, 2018 (3 updates tracked since 2018).

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About Dr. Brett Aaron Stark Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. BRETT AARON STARK MD (NPI 1831693779) is an individual reproductive endocrinology provider in San Francisco, California, licensed in California (A166780) and active in the NPI registry since March 2018. He is enrolled in Medicare PECOS and maintains a secondary practice location in San Francisco.

NPPES Registry Identity

NPI1831693779

Entity TypeIndividualMale

Primary Taxonomy207VE0102X

Provider Legal NameDR. BRETT AARON STARKCredential: MD

Location Address499 ILLINOIS ST FL 6San Francisco, CA 94158-2518

Mailing Address499 Illinois St Fl 6San Francisco, CA 94158-2518 · (415) 353-7475 · Fax (415) 353-7744

Phone(415) 353-7475

Fax(415) 353-7744

Sole ProprietorNo

Enumeration DateMarch 23, 2018

Last NPPES UpdateAugust 5, 20223 updates tracked since enumeration

NPPES CertifiedAugust 5, 2022

✔ NPI 1831693779 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyObstetrics & Gynecology · Reproductive EndocrinologyAllopathic & Osteopathic Physicians

Taxonomy Code207VE0102X

License✔ Licensed in CA · A166780

Definition

An obstetrician/gynecologist who is capable of managing complex problems relating to reproductive endocrinology and infertility.

Also ListedObstetrics & GynecologyTaxonomy 207V00000X · License A166780 (CA)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

499 ILLINOIS ST FL 6, San Francisco, CA 94158

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Other Names 1

Former Name (1)Brett Aaron Clark Clark

Secondary Practice Location 1

Location 11001 Potrero AveSan Francisco, CA 94110-3518 · Phone (415) 206-4069

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Brett Aaron Stark Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94158 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$153.83 typical visit price

range $69.00 – $202.35

Typical copayment $38.45 (range $17.25 – $50.58)

Most-billed visit code 99204

Established Patient

$119.48 typical visit price

range $23.44 – $166.46

Typical copayment $29.87 (range $5.86 – $41.61)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

74.46/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Promoting Interoperability

Improvement Activities

Cost

46.68

Other Providers at the Same Location NPPES 16

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. MARTHA WALKER NOEL M.D.

Obstetrics & Gynecology (Reproductive Endocrinology)

499 ILLINOIS ST FL 6, UCSF CENTER FOR REPRODUCTIVE HEALTH
SAN FRANCISCO, CA 94158

San Francisco County (415) 353-7475

DR. SARAH RACHEL HOLLEY PHD

Psychologist (Clinical)