NPPES file of Aug 9, 2026

G. Michael Gerard Chun, M.D.

Specialist · Irvine, CA

G. Michael Gerard Chun, M.D. is a specialist with a practice address in Irvine, California, and NPI 1578590899, issued on Jun 26, 2006. Check the license (California A50023, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1578590899
Name
G. Michael Gerard Chun
Credential
M.D.
Primary taxonomy
Specialist 174400000X
License number
A50023 CA
Self-reported in NPPES; status is on the state search
Practice location
16200 Sand Canyon Ave, Irvine, CA 92618
Phone
(949) 753-2365
Enumerated
Jun 26, 2006
Record last updated
Sep 15, 2008 (not updated in 18 years: call before relying on the address or phone)
Fax
(949) 753-2368
Medicare enrollment
Enrolled (PECOS I20071025000547); accepts Medicare assignment
Medical or professional school
Tulane University School Of Medicine, 1989
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest specialist records → All 5,749 in California → Look up another NPI →

Also registered at 16200 Sand Canyon Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Christine AyalaNurse Practitioner1831879154
  2. Nicholas Bove, MDEmergency Medicine Physician1255837837
  3. David Calica, M.D.Anesthesiology Physician1780787606
  4. Danielle CarlsonRegistered Nurse1710850409
  5. John Chien, M.D.Hospitalist Physician1790043651
  6. Michael Cho, M.D.Hospitalist Physician1184915001

Verify G. Michael Gerard Chun in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license A50023    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. United Medical Imaging Healthcare IncFountain Valley, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

G. Michael Gerard Chun among 5,749 specialist records in California

G. Michael Gerard Chun, M.D. is one of 5,749 specialist records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.

  • NPI issued2006 · 7% of these records are older, 60% newer
  • In a Medicare fileYes · 30% of these records are
  • In the CMS Doctors and Clinicians fileYes · 19% of these records are
  • Graduated1989 · median 1989 among the 1,075 with a school on file
  • Record last updated2008 · 77% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Specialist providers in California

There are 5,749 specialist records in California.

All 5,749 in California → Every provider in Irvine → Specialist nationwide →

The 8 specialist records with the nearest ZIP codes

  1. Michele Fullmer, MDIrvine, CA 926181245219575
  2. Sheba Gabrail, M.D.Irvine, CA 926181538247168
  3. Linda Globerman, MDIrvine, CA 926181407835952
  4. Terry Globerson, MDIrvine, CA 926181972602480
  5. Bruce Hagadorn, M.D.Irvine, CA 926181760512461
  6. Larry Ho, M.D.Irvine, CA 926181679559579
  7. Terence Maloy, MDIrvine, CA 926181548249006
  8. Nida Nicasio, M.D.Irvine, CA 926181881803773

Common questions

What is G. Michael Gerard Chun, M.D.'s NPI number?

G. Michael Gerard Chun, M.D.'s National Provider Identifier (NPI) is 1578590899, issued on Jun 26, 2006. An NPI identifies a provider in billing; it is not a license.

Where is G. Michael Gerard Chun, M.D. located?

The NPPES record lists a practice address at 16200 Sand Canyon Ave, Irvine, CA, 92618. Phone: (949) 753-2365. Providers update this record themselves, so call before visiting.

How can I verify G. Michael Gerard Chun, M.D.'s license?

NPPES lists California license number A50023, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.