Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Kathleen Marie Brennan, MD

Reproductive Endocrinology Physician in Santa Monica, CA · enumerated 2007.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1306033741

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Registry record

Entity type Individual (Type 1)

Name Kathleen Marie Brennan

Credential MD

Sex Female

Practice address 1245 16th St Ste 202, Santa Monica, CA, 90404

Phone (310) 794-7274

Enumeration date Oct 1, 2007

Last updated in NPPES Sep 20, 2024

Taxonomy & licenses

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License A94984 (CA) Secondary

207VE0102X Reproductive Endocrinology Physician Allopathic & Osteopathic Physicians · License A94984 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
00A949840	Medicaid	CA	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Where does Kathleen Brennan practice?

The practice location on file with NPPES is in Santa Monica, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Kathleen Brennan?

The National Provider Identifier (NPI) for Kathleen Brennan is 1306033741, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Sulagna Chakraburty Saitta Clinical Genetics (M.D.) Physician · Santa Monica, CA NPI 1417965831 Rajita Patil Obstetrics & Gynecology Physician · Santa Monica, CA NPI 1114005691 Kathryn Goldrath Obstetrics & Gynecology Physician · Santa Monica, CA NPI 1164953030 Macey Barnes Obstetrics & Gynecology Physician · Santa Monica, CA NPI 1861985285 Mary-Ann Stothers Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician · Santa Monica, CA NPI 1801505441

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-09-20.