Quick answers
- Which hospitals does Jonathon J. Ahn work at?
- Medicare's official clinician data lists Jonathon J. Ahn at 1 hospital: Providence St. Jude Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jonathon J. Ahn see patients?
- Medicare's clinician data lists 1 practice location in Fullerton, CA. Call before your visit to confirm the address.
- What is Jonathon J. Ahn's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does Jonathon J. Ahn accept Medicare assignment?
- Yes. Medicare's clinician data says Jonathon J. Ahn accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Jonathon J. Ahn?
- (714) 871-3280, as listed in official Medicare / NPI Registry data.
- What is Jonathon J. Ahn's NPI number?
- 1053803882. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jonathon J. Ahn works
Medicare's Facility Affiliation Data lists Jonathon J. Ahn at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Providence St. Jude Medical CenterFullerton, CA · Acute Care Hospital · CCN 050168
Practice locations
Addresses where Jonathon J. Ahn is enrolled with Medicare (CMS data updated 2026-10-02).
- 101 E Valencia Mesa DrFullerton, CA 92835 (714) 871‑3280
Group practices
Medicare enrollment lists Jonathon J. Ahn as a member of this group (CMS data updated 2026-10-02).
- Allied Anesthesia Medical Group Inc191 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Fullerton
Clinicians with the same Medicare primary specialty in Fullerton, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loma Linda University School Of Medicine |
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1053803882 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians