JOHN AHN MD
NPI 1073072914
Student in an Organized Health Care Education/Training Program in Riverside, CA
About John Ahn Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN AHN MD (NPI 1073072914) is an individual student in an organized health care education/training program in Riverside, California and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS and is a graduate of Medical College Of Georgia School Of Medicine (2019).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
John Ahn Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show John Ahn reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Fontana, CA 92335
- Reassigned Medicare billing, California enrollment
- 5,228 clinicians in this Medicare group
Santa Clara, CA 95051
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Other Providers at the Same Location NPPES
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
RIVERSIDE, CA 92501
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Ahn's NPI number?
The NPI number for John Ahn is 1073072914. It was assigned to this individual provider in the NPPES registry on March 19, 2019.
Where is John Ahn located?
John Ahn practices at Riverside Community Hospital 4445 Magnolia Ave., Gme Office, Riverside, CA 92501. The listed phone number is (951) 788-3000.
What is John Ahn's specialty?
The primary specialty registered for this NPI is Student in an Organized Health Care Education/Training Program with taxonomy code 390200000X.
Is John Ahn enrolled in Medicare?
Yes. John Ahn is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for John Ahn's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Ahn reassigns Medicare benefits to 2 organizations: Southern California Permanente Medical Group (Fontana, CA) and Permanente Medical Group Inc (Santa Clara, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Ahn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for John Ahn was last updated on January 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# John Ahn, MD · NPI 1073072914
Student in an Organized Health Care Education/Training Program provider in Riverside, California. Individual provider, active in the CMS NPPES registry since March 19, 2019.
## Identity
- **NPI:** 1073072914 (Entity type: Individual)
- **Enumerated:** March 19, 2019
- **Primary specialty:** Student in an Organized Health Care Education/Training Program · taxonomy 390200000X
- **Sole proprietor:** No
## Practice location
- **Address:** RIVERSIDE COMMUNITY HOSPITAL, 4445 MAGNOLIA AVE., GME OFFICE, Riverside, CA 92501
- **Phone:** (951) 788-3000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Southern California Permanente Medical Group (NPI 1689606196, Fontana, CA); Permanente Medical Group Inc (NPI 1073606299, Santa Clara, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Medical College Of Georgia School Of Medicine, class of 2019
## Record status
- **NPPES last updated:** January 3, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1073072914) · Data from the CMS NPPES public registry.