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

Individual provider Internal Medicine Physician · NPI 1902244791

Matthew William Stier, MD is an Internal Medicine in Chicago, Illinois. Graduated from University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb) in 2013, 13 years ago. Practices with Rockford Gastroenterology Associates Ltd, a 27-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
13
Trained at
University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb)
Licensed in
IL
In the registry since
2013
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

5841 S Maryland Ave M/c 7082
Chicago, IL 60637-1447
Phone: (773) 702-6840
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 125062675 (IL)

Record details

NPI number1902244791
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 13, 2013
Last updated in NPPESAugust 1, 2019

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF ILLINOIS COLLEGE OF MED (CHI/PEOR/ROCK/CHM-URB)
Graduated 2013 (13 years in practice)
Group practice Rockford Gastroenterology Associates Ltd — 27 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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