Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

G. Michael Gerard Chun, M.D.

Specialist in Irvine, CA · enumerated 2006.

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

National Provider Identifier

1578590899

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name G. Michael Gerard Chun

Credential M.D.

Sex Male

Practice address 16200 Sand Canyon Ave, Irh Department of Radiology, Irvine, CA, 92618

Phone (949) 753-2365

Fax (949) 753-2368

Enumeration date Jun 26, 2006

Last updated in NPPES Sep 15, 2008

Taxonomy & licenses

174400000X Specialist Other Service Providers · License A50023 (CA) Primary

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.

Read the full guide → Validate an NPI →

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 G. Michael Chun?

G. Michael Chun is registered in NPPES with the primary taxonomy of Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-09-15.