Quick answers
- Which hospitals does Duke Ahn work at?
- Medicare's official clinician data lists Duke Ahn at 1 hospital: UCI Health-Orange. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Duke Ahn see patients?
- Medicare's clinician data lists 1 practice location in Los Alamitos, CA. Call before your visit to confirm the address.
- What is Duke Ahn's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does Duke Ahn accept Medicare assignment?
- Yes. Medicare's clinician data says Duke 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 Duke Ahn?
- (562) 583-2250, as listed in official Medicare / NPI Registry data.
- What is Duke Ahn's NPI number?
- 1942318373. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Duke Ahn works
Medicare's Facility Affiliation Data lists Duke Ahn at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- UCI Health-OrangeOrange, CA · Acute Care Hospital · CCN 050348
Practice locations
Addresses where Duke Ahn is enrolled with Medicare (CMS data updated 2026-10-02).
- 3700 Katella Ave, Suite CLos Alamitos, CA 90720 (562) 583‑2250
Group practices
Medicare enrollment lists Duke Ahn as a member of this group (CMS data updated 2026-10-02).
- Prohealth Partners, a Medical Group239 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Los Alamitos
Clinicians with the same Medicare primary specialty in Los Alamitos, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northwestern University Feinberg Medical School |
| Graduation year | 1990 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1942318373 |
| 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