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

Dr. Mark B Deyoung, MD

Individual provider Family Medicine Physician · NPI 1306845045

Dr. Mark B Deyoung, MD is a Family Practice in Elmwood, Illinois. Graduated from University of Michigan Medical School in 1978, 48 years ago. Practices with Graham Hospital Association, a 123-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
48
Trained at
University of Michigan Medical School
Licensed in
IL
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1024 N Magnolia St
Elmwood, IL 61529-9602
Phone: (309) 742-6334
Fax: (309) 647-6880
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 120 E Gale St, Williamsfield, IL 61489-5418 — (309) 639-4004

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 036108454 (IL)

Record details

NPI number1306845045
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 15, 2005
Last updated in NPPESFebruary 21, 2022
Certification dateFebruary 21, 2022
Mailing address180 S Main St, Canton, IL 61520-2608

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF MICHIGAN MEDICAL SCHOOL
Graduated 1978 (48 years in practice)
Group practice Graham Hospital Association — 123 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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