Michael Y. Chan, M.D.
Internal Medicine Physician · Los Angeles, CA
Michael Y. Chan, M.D. is an internal medicine physician with a practice address in Los Angeles, California, and NPI 1841442464, issued on Oct 14, 2008. Check the license (California A102377, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael Y. Chan
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A102377 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1983 Marengo St, Los Angeles, CA 90033
- Phone
- (562) 882-8889
- Enumerated
- Oct 14, 2008
- Record last updated
- Dec 7, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20120719000469); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1983 Marengo St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mirasol AgustinGastroenterology Registered Nurse1073036695
- Somaya Albhaisi, MBBCH, MPHGastroenterology Physician1518318104
- Sinat Aleje, NPPsychiatric/Mental Health Nurse Practitioner1609496736
- Ashkon AnsariEmergency Medicine Physician1730551607
- Leila AquinoGastroenterology Registered Nurse1497279574
- Kirsten Balogh, NPFamily Nurse Practitioner1770821217
Verify Michael Y. Chan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A102377Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% fewer Medicare Part D claims than the average internal medicine physician in 2024
943 Medicare Part D claims for 369 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Gavilyte-C173 claims
- Pantoprazole Sodium109 claims
- Omeprazole102 claims
- Azathioprine56 claims
- Mesalamine37 claims
- Ursodiol29 claims
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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupMoreno Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Y. Chan among 17,696 internal medicine physician records in California
Michael Y. Chan, M.D. 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 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 40% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2006 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 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
- Ron Ben-Ari, M.D.Los Angeles, CA 900331275562431
- John Brodhead, M.D.Los Angeles, CA 900331760424824
- Bharat Chaudry, M.D.Los Angeles, CA 900331194754374
- William Hardy, M.D.Los Angeles, CA 900331760410518
- Howard Hodis, M.D.Los Angeles, CA 900331407894009
- Eric Hsieh, M.D.Los Angeles, CA 900331811941974
- Jenny Hwang, M.D.Los Angeles, CA 900331578548764
- Michael Karp, M.D.Los Angeles, CA 900331336177229
Common questions
What is Michael Y. Chan, M.D.'s NPI number?
Michael Y. Chan, M.D.'s National Provider Identifier (NPI) is 1841442464, issued on Oct 14, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Michael Y. Chan, M.D. located?
The NPPES record lists a practice address at 1983 Marengo St, Los Angeles, CA, 90033. Phone: (562) 882-8889. Providers update this record themselves, so call before visiting.
How can I verify Michael Y. Chan, M.D.'s license?
NPPES lists California license number A102377, 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 Y. Chan, M.D. prescribe under Medicare Part D?
In 2024, Michael Y. Chan, M.D. had 943 Medicare Part D claims for 369 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.