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

Peter George Mavrelis, MD

Individual provider Gastroenterology Physician · NPI 1326043597

Peter George Mavrelis, MD practises Gastroenterology in Hobart, Indiana. Graduated from University of Chicago, Pritzker School of Medicine in 1972, 54 years ago. Practices with The Methodist Hospitals Inc, a 131-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Indiana.

Years since qualifying
54
Trained at
University of Chicago, Pritzker School of Medicine
Licensed in
IN
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

7895 Grand Blvd
Hobart, IN 46342-6665
Phone: (219) 947-1910
Fax: (219) 758-5009
Show map & directions

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

Additional practice locations (2)

  • 101 E 87th Ave Ste 420, Merrillville, IN 46410-7335 — (219) 758-5008
  • 3800 Saint Mary Rd Ste 304, Valparaiso, IN 46383-3986 — (219) 947-6795

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 01030831A (IN)

Record details

NPI number1326043597
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 15, 2005
Last updated in NPPESDecember 9, 2022
Certification dateDecember 9, 2022

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF CHICAGO, PRITZKER SCHOOL OF MEDICINE
Graduated 1972 (54 years in practice)
Group practice The Methodist Hospitals Inc — 131 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Upper gastrointestinal (GI) endoscopy for acid reflux 30 times · 56th percentile
Colonoscopy 20 times · 48th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients125
Services billed 170 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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.

Colleagues at The Methodist Hospitals Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 131 clinicians in the practice; 12 are shown here.