NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Geoffrey Cornelius Quinn, M.D.

Internal Medicine Physician in San Francisco, CA · enumerated 2006.

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

National Provider Identifier

1215975826

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Geoffrey Cornelius Quinn
Credential M.D.
Sex Male
Practice address San Francisco, CA, 94115
Phone (415) 668-1147
Fax (415) 668-7615
Enumeration date Jun 4, 2006
Last updated in NPPES Feb 15, 2024

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License G083611 (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
G083611 Other CA MEDICAL LICENSE NUMBER

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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Geoffrey Quinn's NPI record?
Cross-check NPI 1215975826 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1215975826 active?
Yes, as of the latest NPPES snapshot, NPI 1215975826 is active (record last updated 2024-02-15).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-02-15.