Lex Chen, M.D.
Hospitalist Physician · Sylmar, CA
Lex Chen, M.D. is a hospitalist physician with a practice address in Sylmar, California, and NPI 1265607956, issued on Apr 24, 2008. Check the license (California A110087, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Lex Chen
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A110087 CA
Self-reported in NPPES; status is on the state search - Practice location
- 14445 Olive View Dr, Sylmar, CA 91342
- Phone
- (818) 364-3205
- Enumerated
- Apr 24, 2008
- Record last updated
- Mar 14, 2024
- Medicare enrollment
- Enrolled (PECOS I20110216000514); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2008
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 14445 Olive View Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nasser Abdo, MDInternal Medicine Physician1306911649
- Gezman Abdullahi, M.D.Internal Medicine Physician1225394380
- Moyosore Abere, NPNurse Practitioner1225667314
- Ammini Abraham, MDAnesthesiology Physician1467531541
- Margarita Acosta, RN, AGACNPAcute Care Nurse Practitioner1609202415
- Fredric Adler, MDInternal Medicine Physician1356376735
Verify Lex Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A110087Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% fewer Medicare Part D claims than the average hospitalist physician in 2024
453 Medicare Part D claims for 210 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Levofloxacin26 claims
- Metoprolol Tartrate25 claims
- Prednisone25 claims
- Pantoprazole Sodium22 claims
- Furosemide21 claims
- Ciprofloxacin Hcl20 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 GroupAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lex Chen among 3,099 hospitalist physician records in California
Lex Chen, M.D. is one of 3,099 hospitalist physician records with a practice address in California. 90% 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 34% of them.
- NPI issued2008 · 34% of these records are older, 61% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2008 · median 2010 among the 2,505 with a school on file
- Record last updated2024 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Sylmar → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Alvera Akroush, M.D.Sylmar, CA 913421730315359
- Christine Dang, M.D.Sylmar, CA 913421669648192
- Tavit Dunnsiri, MDSylmar, CA 913421649899477
- Therlinder Lo, MDSylmar, CA 913421912585795
- Glen Pearlstein, M.D.Sylmar, CA 913421851558837
- Jaclyn Spiegel, MDSylmar, CA 913421427323591
- Erfan Zarrinkhoo, MDSylmar, CA 913421568081966
- Ali Azizi, M.D.Mission Hills, CA 913451225234529
Common questions
What is Lex Chen, M.D.'s NPI number?
Lex Chen, M.D.'s National Provider Identifier (NPI) is 1265607956, issued on Apr 24, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Lex Chen, M.D. located?
The NPPES record lists a practice address at 14445 Olive View Dr, Sylmar, CA, 91342. Phone: (818) 364-3205. Providers update this record themselves, so call before visiting.
How can I verify Lex Chen, M.D.'s license?
NPPES lists California license number A110087, 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 Lex Chen, M.D. prescribe under Medicare Part D?
In 2024, Lex Chen, M.D. had 453 Medicare Part D claims for 210 beneficiaries; the average among hospitalist physician prescribers was 521. 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.