Quick answers
- Which hospitals does Marc R. Dejong work at?
- Medicare's official clinician data lists Marc R. Dejong at 2 hospitals: Memorial Medical Center and St Johns Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marc R. Dejong see patients?
- Medicare's clinician data lists 2 practice locations, including Jacksonville, IL and Springfield, IL. Call before your visit to confirm the address.
- What is Marc R. Dejong's specialty?
- Medicare lists Sports Medicine as the primary specialty, and also Internal Medicine.
- Does Marc R. Dejong accept Medicare assignment?
- Yes. Medicare's clinician data says Marc R. Dejong 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 Marc R. Dejong?
- (217) 291-1041, as listed in official Medicare / NPI Registry data.
- What is Marc R. Dejong's NPI number?
- 1477549541. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marc R. Dejong works
Medicare's Facility Affiliation Data lists Marc R. Dejong at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Memorial Medical CenterSpringfield, IL · Acute Care Hospital · CCN 140148
- St Johns HospitalSpringfield, IL · Acute Care Hospital · CCN 140053
Practice locations
Addresses where Marc R. Dejong is enrolled with Medicare (CMS data updated 2026-10-02).
- 15 Founders LnJacksonville, IL 62650 (217) 291‑1041
- 800 N 1st StSpringfield, IL 62702 (217) 528‑7541
Group practices
Medicare enrollment lists Marc R. Dejong as a member of this group (CMS data updated 2026-10-02).
- Springfield Clinic, LLP687 clinicians in the group
Specialties
- Sports Medicineprimary
- Internal Medicinealso
Other sports medicine doctors in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Vanderbilt University School Of Medicine |
| Graduation year | 2001 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1477549541 |
| 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