Anna M. Chen, D.O.
Internal Medicine Physician · Mission Hills, CA
Anna M. Chen, D.O. is an internal medicine physician with a practice address in Mission Hills, California, and NPI 1245475599, issued on Dec 15, 2008. Check the license (California 20A10564, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Anna M. Chen
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A10564 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11333 Sepulveda Blvd, Mission Hills, CA 91345
- Phone
- (818) 365-9531
- Enumerated
- Dec 15, 2008
- Record last updated
- Dec 14, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 11333 Sepulveda Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Anna M. Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A10564Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average internal medicine physician in 2024
336 Medicare Part D claims for 178 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 15 claims were for opioids.
Most prescribed
- Lidocaine29 claims
- Azelastine Hcl26 claims
- Meloxicam22 claims
- Cephalexin21 claims
- Cefpodoxime Proxetil16 claims
- Amoxicillin-Clavulanate Potass15 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.
Industry payments in 2024: $25.92
1 payment: food and beverage; the largest payer was Abbvie Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Anna M. Chen among 17,696 internal medicine physician records in California
Anna M. 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 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 fileNo · 63% of these records are
- 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).
89 internal medicine physician records list a practice address in Mission Hills
They are 89 of the 731 NPPES records with a practice address in Mission Hills, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Mission Hills → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Joseph Chambers, MD.Mission Hills, CA 913451467435297
- Delora Climaco, MD.Mission Hills, CA 913451407880743
- Jay Dhiman, MDMission Hills, CA 913451598758245
- Jose Esparrago, M.D.Mission Hills, CA 913451083616106
- Noel Flores, M.D.Mission Hills, CA 913451316921000
- Jennifer Hyer, D.O.Mission Hills, CA 913451770567711
- Manoj Mathew, M.D.Mission Hills, CA 913451962479816
- Jaganath Naidu, MDMission Hills, CA 913451447283924
Common questions
What is Anna M. Chen, D.O.'s NPI number?
Anna M. Chen, D.O.'s National Provider Identifier (NPI) is 1245475599, issued on Dec 15, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Anna M. Chen, D.O. located?
The NPPES record lists a practice address at 11333 Sepulveda Blvd, Mission Hills, CA, 91345. Phone: (818) 365-9531. Providers update this record themselves, so call before visiting.
How can I verify Anna M. Chen, D.O.'s license?
NPPES lists California license number 20A10564, 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 Anna M. Chen, D.O. prescribe under Medicare Part D?
In 2024, Anna M. Chen, D.O. had 336 Medicare Part D claims for 178 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.