Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Brendan R Quinn, PSY.D.

Counselor in Greenbrae, CA · enumerated 2008.

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

National Provider Identifier

1518118959

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Registry record

Entity type Individual (Type 1)

Name Dr. Brendan R Quinn

Credential PSY.D.

Sex Male

Practice address 250 Bon Air Rd, Greenbrae, CA, 94904

Phone (415) 473-6666

Enumeration date Oct 3, 2008

Last updated in NPPES Nov 19, 2013

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service Providers Primary

PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD credential

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Brendan Quinn?

Brendan Quinn is registered in NPPES with the primary taxonomy of Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Marin Community Clinic Federally Qualified Health Center (FQHC) · Greenbrae, CA NPI 1124021738 Aida Calvillo Internal Medicine Physician · Greenbrae, CA NPI 1225031727 Debra Walhof Pediatrics Physician · Greenbrae, CA NPI 1912900499 Georgianna Farren Internal Medicine Physician · Greenbrae, CA NPI 1346249067 Janet Miller-Melka Nurse Practitioner · Greenbrae, CA NPI 1780677963 Dana Huskey Obstetrics & Gynecology Physician · Greenbrae, CA NPI 1538146337 Russell Fritz Diagnostic Radiology Physician · Greenbrae, CA NPI 1679550032 Marin General Hospital General Acute Care Hospital · Greenbrae, CA NPI 1396725677

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-11-19.