John Ahn, MD
Student in an Organized Health Care Education/Training Program · Riverside, CA
John Ahn, MD is a student in an organized health care education/training program with a practice address in Riverside, California, and NPI 1073072914, issued on Mar 19, 2019. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John Ahn
- Credential
- MD
- Primary taxonomy
- Student in an Organized Health Care Education/Training Program 390200000X
- Practice location
- Riverside Community Hospital, Riverside, CA 92501
- Phone
- (951) 788-3000
- Enumerated
- Mar 19, 2019
- Record last updated
- Jan 3, 2025
- Medicare enrollment
- Enrolled (PECOS I20230920000376); accepts Medicare assignment
- Medical or professional school
- Medical College Of Georgia School Of Medicine, 2019
- Entity
- Type 1 · individual
8 nearest student in an organized health care education/training program records → All 40,652 in California → Look up another NPI →
Also registered at Riverside Community Hospital
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Harjeet Singh, MDStudent in an Organized Health Care Education/Training Program1902367295
Verify John Ahn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5.0 times the Medicare Part D claims of the average student in an organized health care education/training program in 2024
930 Medicare Part D claims for 439 beneficiaries, against an average of 185 among the 59,748 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Fluorouracil350 claims
- Calcipotriene159 claims
- Clobetasol Propionate64 claims
- Triamcinolone Acetonide46 claims
- Doxycycline Monohydrate34 claims
- Amjevita(Cf) Autoinjector28 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 GroupRiverside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Ahn among 40,652 student in an organized health care education/training program records in California
John Ahn, MD is one of 40,652 student in an organized health care education/training program records with a practice address in California. 16% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 20% of them.
- NPI issued2019 · 20% of these records are older, 76% newer
- In a Medicare fileYes · 16% of these records are
- In the CMS Doctors and Clinicians fileYes · 6% of these records are
- Graduated2019 · median 2017 among the 2,409 with a school on file
- Record last updated2025 · 26% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 390200000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
657 student in an organized health care education/training program records list a practice address in Riverside
They are 657 of the 13,893 NPPES records with a practice address in Riverside, and 40,652 student in an organized health care education/training program records in California.
All 40,652 in California → Every provider in Riverside → Student in an Organized Health Care Education/Training Program nationwide →
The 8 student in an organized health care education/training program records with the nearest ZIP codes
- Josiah ChungRiverside, CA 925011033614862
- Mina Elsabee, MDRiverside, CA 925011811446966
- Danial Fisher, DORiverside, CA 925011740414515
- Asma Husain, MDRiverside, CA 925011720515216
- Subhpaljit KaurRiverside, CA 925011750812939
- Eric LiaoRiverside, CA 925011760986756
- Darshan Manix, M.D.Riverside, CA 925011801337076
- Demmi MejiaRiverside, CA 925011154989994
Common questions
What is John Ahn, MD's NPI number?
John Ahn, MD's National Provider Identifier (NPI) is 1073072914, issued on Mar 19, 2019. An NPI identifies a provider in billing; it is not a license.
Where is John Ahn, MD located?
The NPPES record lists a practice address at Riverside Community Hospital, Riverside, CA, 92501. Phone: (951) 788-3000. Providers update this record themselves, so call before visiting.
How can I verify John Ahn, MD's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does John Ahn, MD prescribe under Medicare Part D?
In 2024, John Ahn, MD had 930 Medicare Part D claims for 439 beneficiaries; the average among student in an organized health care education/training program prescribers was 185. 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.