Quick answers
- Which hospitals does Harold A. Yoon work at?
- Medicare's official clinician data lists Harold A. Yoon at 5 hospitals: Decatur Memorial Hospital, HSHS St Elizabeth's Hospital, Pana Community Hospital, St Marys Hospital and Taylorville Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Harold A. Yoon see patients?
- Medicare's clinician data lists 2 practice locations, including Decatur, IL and Effingham, IL. Call before your visit to confirm the address.
- What is Harold A. Yoon's specialty?
- Medicare lists Radiation Oncology as the primary specialty.
- Does Harold A. Yoon accept Medicare assignment?
- Yes. Medicare's clinician data says Harold A. Yoon 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 Harold A. Yoon?
- (217) 877-9442, as listed in official Medicare / NPI Registry data.
- What is Harold A. Yoon's NPI number?
- 1558566984. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Harold A. Yoon works
Medicare's Facility Affiliation Data lists Harold A. Yoon at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Decatur Memorial HospitalDecatur, IL · Acute Care Hospital · CCN 140135
- HSHS St Elizabeth's HospitalO Fallon, IL · Acute Care Hospital · CCN 140187
- Pana Community HospitalPana, IL · Critical Access Hospital · CCN 141341
- St Marys HospitalDecatur, IL · Acute Care Hospital · CCN 140166
- Taylorville Memorial HospitalTaylorville, IL · Critical Access Hospital · CCN 141339
Practice locations
Addresses where Harold A. Yoon is enrolled with Medicare (CMS data updated 2026-10-02).
- 210 W McKinley Ave, Suite 1Decatur, IL 62526 (217) 877‑9442
- 905 Medical Park DrEffingham, IL 62401 (217) 342‑2066
Group practices
Medicare enrollment lists Harold A. Yoon as a member of this group (CMS data updated 2026-10-02).
- Cancer Care Specialists of Central Illinois SC31 clinicians in the group
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in Decatur
Clinicians with the same Medicare primary specialty in Decatur, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Illinois College Of Med (chi/peor/rock/chm-Urb) |
| Graduation year | 2003 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1558566984 |
| 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