G. Michael Chun, M.D.
NPI 1578590899 · Specialist · Irvine, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
G. Michael Chun, M.D. is a Specialist provider in Irvine, CA (NPI 1578590899).
Provider details
- NPI number
- 1578590899
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A50023 (CA)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
394 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Dxa Bone Density Measurement of Hip, Pelvis, Spine77080 | 109 | $44 |
| Screening Mammography77067 | 57 | $145 |
| Fine Needle Aspiration Biopsy Using Ultrasound Guidance, First Growth10005 | 49 | $116 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 45 | $118 |
| Ultrasound Scan of Head and Neck Soft Tissue76536 | 30 | $126 |
| Ultrasound Scan of Organ Tissue for Measuring Elasticity76981 | 28 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-26
- Last updated
- 2008-09-15
Frequently asked questions
- What is G. Michael Chun's NPI number?
- G. Michael Chun's National Provider Identifier (NPI) is 1578590899, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is G. Michael Chun's specialty?
- G. Michael Chun is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is G. Michael Chun located?
- G. Michael Chun's practice location on file with NPPES is 16200 Sand Canyon Ave, Irvine, CA 92618-3714.
- What is G. Michael Chun's phone number?
- The practice phone number listed in the NPPES registry for G. Michael Chun is (949) 753-2365.
- Does G. Michael Chun accept Medicare?
- G. Michael Chun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is G. Michael Chun's NPI active?
- Yes — G. Michael Chun's NPI (1578590899) is active in the NPPES registry as of the last update on 2008-09-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.