Quick answers
- Which hospitals does Johan K. Ahn work at?
- Medicare's official clinician data lists Johan K. Ahn at 1 hospital: The Queens Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Johan K. Ahn see patients?
- Medicare's clinician data lists 9 practice locations, including Honolulu, HI, Kamuela, HI and Corona, CA. Call before your visit to confirm the address.
- What is Johan K. Ahn's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Johan K. Ahn accept Medicare assignment?
- Yes. Medicare's clinician data says Johan K. 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 Johan K. Ahn?
- (808) 691-8526, as listed in official Medicare / NPI Registry data.
- What is Johan K. Ahn's NPI number?
- 1972546240. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Johan K. Ahn works
Medicare's Facility Affiliation Data lists Johan K. Ahn at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- The Queens Medical CenterHonolulu, HI · Acute Care Hospital · CCN 120001
Practice locations
Addresses where Johan K. Ahn is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 9; the Medicare profile lists all.
- 1215 Hunakai StHonolulu, HI 96816
- 1301 Punchbowl StHonolulu, HI 96813
- 1380 Lusitana StHonolulu, HI 96813
- 1401 S Beretania St, Suite 750Honolulu, HI 96814 (808) 691‑8526
- 449 Kapahulu Ave, Suite 104Honolulu, HI 96815 (808) 735‑0007
Group practices
Medicare enrollment lists Johan K. Ahn as a member of these groups (CMS data updated 2026-10-02).
- Queens University Medical Group614 clinicians in the group
- Beverly Radiology Medical Group III328 clinicians in the group
- Queens North Hawaii Community Hospital108 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Honolulu
Clinicians with the same Medicare primary specialty in Honolulu, HI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York Medical College |
| Graduation year | 1995 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1972546240 |
| 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