Alan T. Chiem, MD, MPH
Emergency Medicine Physician · Sylmar, CA
Alan T. Chiem, MD, MPH is an emergency medicine physician with a practice address in Sylmar, California, and NPI 1477716967, issued on Jul 6, 2008. Check the license (California A116121, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alan T. Chiem
- Credential
- MD, MPH
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A116121 CA
Self-reported in NPPES; status is on the state search - Practice location
- 14445 Olive View Dr, Sylmar, CA 91342
- Phone
- (818) 364-3107
- Enumerated
- Jul 6, 2008
- Record last updated
- Mar 23, 2015 (not updated in 11 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 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.
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- Moyosore Abere, NPNurse Practitioner1225667314
- Ammini Abraham, MDAnesthesiology Physician1467531541
- Margarita Acosta, RN, AGACNPAcute Care Nurse Practitioner1609202415
- Fredric Adler, MDInternal Medicine Physician1356376735
Verify Alan T. Chiem in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A116121Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average emergency medicine physician in 2024
14 Medicare Part D claims for 11 beneficiaries, against an average of 226 among the 54,106 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.
Alan T. Chiem among 7,751 emergency medicine physician records in California
Alan T. Chiem, MD, MPH is one of 7,751 emergency medicine physician records with a practice address in California. 81% 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 50% of them.
- NPI issued2008 · 50% of these records are older, 46% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2015 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
14 emergency medicine physician records list a practice address in Sylmar
They are 14 of the 1,454 NPPES records with a practice address in Sylmar, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Sylmar → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Jeffrey Guterman, MD MSSylmar, CA 913421639258007
- Shankar Hittalmani, MDSylmar, CA 913421437210879
- Sai-Hung Hui, M.D.Sylmar, CA 913421710166640
- Ebunoluwa Johnson, M.D.Sylmar, CA 913421639332315
- Miguel Lemus, M.D.Sylmar, CA 913421891996575
- Scott Lundberg, MDSylmar, CA 913421770518789
- Maureen McColloughSylmar, CA 913421164569901
- Fredrick Melik-Abrahamian, D.O.Sylmar, CA 913421134159890
Common questions
What is Alan T. Chiem, MD, MPH's NPI number?
Alan T. Chiem, MD, MPH's National Provider Identifier (NPI) is 1477716967, issued on Jul 6, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Alan T. Chiem, MD, MPH located?
The NPPES record lists a practice address at 14445 Olive View Dr, Sylmar, CA, 91342. Phone: (818) 364-3107. Providers update this record themselves, so call before visiting.
How can I verify Alan T. Chiem, MD, MPH's license?
NPPES lists California license number A116121, 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 Alan T. Chiem, MD, MPH prescribe under Medicare Part D?
In 2024, Alan T. Chiem, MD, MPH had 14 Medicare Part D claims for 11 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.