Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Marc R. Dejong, MD

Individual provider Internal Medicine Physician · NPI 1477549541

Marc R. Dejong, MD is a Sports Medicine in Springfield, Illinois. Graduated from Vanderbilt University School of Medicine in 2001, 25 years ago. Practices with Springfield Clinic, LLP, a 679-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
25
Trained at
Vanderbilt University School of Medicine
Licensed in
IL
In the registry since
2005
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

800 N 1st St
Springfield, IL 62702-3719
Phone: (217) 528-7541
Fax: (217) 527-1103
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Sports Medicine (Internal Medicine) Physician (primary) Taxonomy 207RS0010X · Licence 036114259 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 036114259 (IL)

Record details

NPI number1477549541
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 23, 2005
Last updated in NPPESMay 22, 2020
Certification dateMay 22, 2020
Mailing address1025 S 6th St, Springfield, IL 62703-2403

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtySPORTS MEDICINE
Also practisesINTERNAL MEDICINE
Medical schoolVANDERBILT UNIVERSITY SCHOOL OF MEDICINE
Graduated 2001 (25 years in practice)
Group practice Springfield Clinic, Llp — 679 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Springfield