Harry H. Ahn, MD
Family Medicine Physician · Glendale, CA
Harry H. Ahn, MD is a family medicine physician with a practice address in Glendale, California, and NPI 1730492000, issued on Jul 15, 2010. Check the license (California A121353, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Harry H. Ahn
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A121353 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1812 Verdugo Blvd, Glendale, CA 91208
- Phone
- (818) 790-7100
- Enumerated
- Jul 15, 2010
- Record last updated
- Jun 8, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20221021000982); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1812 Verdugo Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Alyssa Bartholomew, MS, RDRegistered Dietitian1770066763
Verify Harry H. Ahn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A121353Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average family medicine physician in 2024
157 Medicare Part D claims for 97 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 18 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen16 claims
- Prednisone13 claims
- Cephalexin12 claims
- Azithromycin11 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
- Pennsylvania Physician Services, LLCScranton, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Harry H. Ahn among 17,133 family medicine physician records in California
Harry H. Ahn, MD is one of 17,133 family 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 2010, is newer than 60% of them.
- NPI issued2010 · 60% of these records are older, 37% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2002 · median 2005 among the 10,652 with a school on file
- Record last updated2018 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
145 family medicine physician records list a practice address in Glendale
They are 145 of the 4,742 NPPES records with a practice address in Glendale, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Glendale → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Niveen Abdelmessih, M.D.Glendale, CA 912081922071059
- Jennifer Boozer, DOGlendale, CA 912081417067299
- Holger Bracht, D.O.Glendale, CA 912081063481976
- Elaine Chu, MDGlendale, CA 912081194892919
- James Cornell, M.D.Glendale, CA 912081447202171
- Summer Drake, D.O.Glendale, CA 912081891920781
- Adam Frederick, M.D.Glendale, CA 912081184809949
- David Han, M.D.Glendale, CA 912081093755977
Common questions
What is Harry H. Ahn, MD's NPI number?
Harry H. Ahn, MD's National Provider Identifier (NPI) is 1730492000, issued on Jul 15, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Harry H. Ahn, MD located?
The NPPES record lists a practice address at 1812 Verdugo Blvd, Glendale, CA, 91208. Phone: (818) 790-7100. Providers update this record themselves, so call before visiting.
How can I verify Harry H. Ahn, MD's license?
NPPES lists California license number A121353, 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 Harry H. Ahn, MD prescribe under Medicare Part D?
In 2024, Harry H. Ahn, MD had 157 Medicare Part D claims for 97 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.