Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Geoffrey B Yang, M.D.
Dermatology Physician in Irvine, CA · enumerated 2012.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1689931271
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Registry record
Entity type Individual (Type 1)
Name Dr. Geoffrey B Yang
Credential M.D.
Sex Male
Practice address C340 Medical Sciences I, Irvine, CA, 92697
Phone (949) 824-4405
Enumeration date Apr 19, 2012
Last updated in NPPES Jun 22, 2018
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD 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.
Frequently asked questions
Is NPI 1689931271 active?
Yes, as of the latest NPPES snapshot, NPI 1689931271 is active (record last updated 2018-06-22).
How do I verify Geoffrey Yang's NPI record?
Cross-check NPI 1689931271 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-06-22.