Michael Chang, DO
Internal Medicine Physician · Los Angeles, CA
Michael Chang, DO is an internal medicine physician with a practice address in Los Angeles, California, and NPI 1639751381, issued on Apr 22, 2021. Check the license (California 20A21346, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael Chang
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A21346 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4867 W Sunset Blvd, Los Angeles, CA 90027
- Phone
- (833) 574-2273
- Enumerated
- Apr 22, 2021
- Record last updated
- Jun 19, 2024
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 4867 W Sunset Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A21346Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
46 Medicare Part D claims for 25 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Michael Chang among 17,696 internal medicine physician records in California
Michael Chang, DO is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 92% of them.
- NPI issued2021 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2024 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,423 internal medicine physician records list a practice address in Los Angeles
They are 1,423 of the 69,537 NPPES records with a practice address in Los Angeles, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Los Angeles → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sangeeta Aggarwal, MDLos Angeles, CA 900271578655908
- Hagop Bezikian, MDLos Angeles, CA 900271821171604
- Roshanak Eftekhari, M.D.Los Angeles, CA 900271619936556
- Martin Hirsch, MDLos Angeles, CA 900271881765774
- Missak Kltchian, MDLos Angeles, CA 900271255359840
- Ani Markarian, M.D.Los Angeles, CA 900271457305435
- Lyn Pestana, MDLos Angeles, CA 900271013088996
- Edward Quiming, MDLos Angeles, CA 900271497826465
Common questions
What is Michael Chang, DO's NPI number?
Michael Chang, DO's National Provider Identifier (NPI) is 1639751381, issued on Apr 22, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Michael Chang, DO located?
The NPPES record lists a practice address at 4867 W Sunset Blvd, Los Angeles, CA, 90027. Phone: (833) 574-2273. Providers update this record themselves, so call before visiting.
How can I verify Michael Chang, DO's license?
NPPES lists California license number 20A21346, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Michael Chang, DO prescribe under Medicare Part D?
In 2024, Michael Chang, DO had 46 Medicare Part D claims for 25 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions 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.
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.