Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mark Hroncich, MD

Individual provider Internal Medicine Physician · NPI 1265465108

Mark Hroncich, MD practises Internal Medicine in Berwyn, Illinois. Graduated from Northwestern University Feinberg Medical School in 1984, 42 years ago. Practices with Loyola Medical Group LLC, a 123-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Illinois.

Years since qualifying
42
Trained at
Northwestern University Feinberg Medical School
Licensed in
IL
In the registry since
2006
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

6425 Cermak Rd Ste 101-102
Berwyn, IL 60402-2338 Not confirmed with CMS for 19 years — call before visiting
Phone: (708) 484-0044
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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 036-071240 (IL)

Record details

NPI number1265465108
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 7, 2006
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesGENERAL SURGERY
Medical schoolNORTHWESTERN UNIVERSITY FEINBERG MEDICAL SCHOOL
Graduated 1984 (42 years in practice)
Group practice Loyola Medical Group Llc — 123 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients281
Services billed 2,133 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Loyola Medical Group LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 123 clinicians in the practice; 12 are shown here.

Other providers in Berwyn