Alexander Chen, D.O.
Internal Medicine Physician · La Mirada, CA
Alexander Chen, D.O. is an internal medicine physician with a practice address in La Mirada, California, and NPI 1114252608, issued on Oct 16, 2009. Check the license (California 20A10965, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alexander Chen
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A10965 CA
Self-reported in NPPES; status is on the state search - Practice location
- 15034 Imperial Hwy, La Mirada, CA 90638
- Phone
- (562) 902-4929
- Enumerated
- Oct 16, 2009
- Record last updated
- Nov 20, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (562) 902-8792
- Medicare enrollment
- Enrolled (PECOS I20120404000412); 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 15034 Imperial Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Alexander Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A10965Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average internal medicine physician in 2024
638 Medicare Part D claims for 221 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 33 claims were for opioids.
Most prescribed
- Amlodipine Besylate32 claims
- Eliquis29 claims
- Atorvastatin Calcium26 claims
- Metformin Hcl18 claims
- Hydrocodone-Acetaminophen17 claims
- Levothyroxine Sodium16 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
- Albion Medical Partners OF California West PCCerritos, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alexander Chen among 17,696 internal medicine physician records in California
Alexander Chen, D.O. 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 2009, is newer than 60% of them.
- NPI issued2009 · 60% of these records are older, 37% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2008 · median 2004 among the 11,065 with a school on file
- Record last updated2020 · 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).
6 internal medicine physician records list a practice address in La Mirada
They are 6 of the 427 NPPES records with a practice address in La Mirada, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in La Mirada → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Anwar Arastu, MDLa Mirada, CA 906381760509749
- Rocely Ella-TamayoLa Mirada, CA 906381336570597
- Hoa Nguyen, M.D.La Mirada, CA 906381508897158
- Ajit Shah, M.D.La Mirada, CA 906381528159233
- Tamra Hocking, M.D.La Mirada, CA 906391548486723
- Jonathan Chien, M.D.Montebello, CA 906401558327270
- Jackson Ma, M.D.Montebello, CA 906401447298732
- Mohinderjit Neelam, M.D.Montebello, CA 906401457325193
Common questions
What is Alexander Chen, D.O.'s NPI number?
Alexander Chen, D.O.'s National Provider Identifier (NPI) is 1114252608, issued on Oct 16, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Alexander Chen, D.O. located?
The NPPES record lists a practice address at 15034 Imperial Hwy, La Mirada, CA, 90638. Phone: (562) 902-4929. Providers update this record themselves, so call before visiting.
How can I verify Alexander Chen, D.O.'s license?
NPPES lists California license number 20A10965, 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 Alexander Chen, D.O. prescribe under Medicare Part D?
In 2024, Alexander Chen, D.O. had 638 Medicare Part D claims for 221 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.