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

Dr. Mark P Demus, MD

Individual provider General Acute Care Hospital · NPI 1477571479

Dr. Mark P Demus, MD is an Internal Medicine in Hoffman Estates, Illinois. Graduated from Northwestern University Feinberg Medical School in 1981, 45 years ago. Practices with Endeavor Health Medical Group, a 3,348-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
45
Trained at
Northwestern University Feinberg Medical School
Licensed in
IL
In the registry since
2006
Specialties on file
3
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

1555 Barrington Rd
Hoffman Estates, IL 60169-1019
Phone: (847) 490-6930
Show map & directions

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

Additional practice locations (1)

  • 21481 N Rand Rd, Kildeer, IL 60047-3061 — (847) 618-9500

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 036-065552 (IL)
General Acute Care Hospital Taxonomy 282N00000X · Licence 036065552 (IL)
General Acute Care Hospital Taxonomy 282N00000X

Record details

NPI number1477571479
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 17, 2006
Last updated in NPPESApril 28, 2021
Certification dateApril 28, 2021
Mailing address21481 N Rand Rd, Kildeer, IL 60047-3061

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesEMERGENCY MEDICINE
Medical schoolNORTHWESTERN UNIVERSITY FEINBERG MEDICAL SCHOOL
Graduated 1981 (45 years in practice)
Group practice Endeavor Health Medical Group — 3348 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations7 on file with Medicare

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