Quick answers
- Which hospitals does Joon S. Ahn work at?
- Medicare's official clinician data lists Joon S. Ahn at 5 hospitals: Fairfield Memorial Hospital 1, Good Samaritan Regional Hlth Center, Pinckneyville Community Hospital, SSM Health St Mary's Hospital -Centralia and Washington County Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Joon S. Ahn see patients?
- Medicare's clinician data lists 3 practice locations, including West Frankfort, IL, Mount Vernon, IL and Mt Vernon, IL. Call before your visit to confirm the address.
- What is Joon S. Ahn's specialty?
- Medicare lists Hand Surgery as the primary specialty, and also Orthopedic Surgery.
- Does Joon S. Ahn accept Medicare assignment?
- Yes. Medicare's clinician data says Joon S. 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 Joon S. Ahn?
- (618) 937-6200, as listed in official Medicare / NPI Registry data.
- What is Joon S. Ahn's NPI number?
- 1083681027. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Joon S. Ahn works
Medicare's Facility Affiliation Data lists Joon S. Ahn at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Fairfield Memorial Hospital 1Fairfield, IL · Critical Access Hospital · CCN 141311
- Good Samaritan Regional Hlth CenterMount Vernon, IL · Acute Care Hospital · CCN 140046
- Pinckneyville Community HospitalPinckneyville, IL · Critical Access Hospital · CCN 141307
- SSM Health St Mary's Hospital -CentraliaCentralia, IL · Acute Care Hospital · CCN 140034
- Washington County HospitalNashville, IL · Critical Access Hospital · CCN 141308
Practice locations
Addresses where Joon S. Ahn is enrolled with Medicare (CMS data updated 2026-10-02).
- 326 E Main StWest Frankfort, IL 62896 (618) 937‑6200
- 4121 Veterans Memorial DrMount Vernon, IL 62864 (618) 242‑3778
- 4121 Veterans Memorial DrMt Vernon, IL 62864
Group practices
Medicare enrollment lists Joon S. Ahn as a member of these groups (CMS data updated 2026-10-02).
- Select Physical Therapy Holdings Inc2,024 clinicians in the group
- Orthopaedic Center of Southern Illinois, Ltd18 clinicians in the group
Specialties
- Hand Surgeryprimary
- Orthopedic Surgeryalso
Other hand surgeons in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Temple University School Of Medicine |
| Graduation year | 1995 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1083681027 |
| 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