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

Dr. John Glenn Mathis, MD

Individual provider Gastroenterology Physician · NPI 1427051341

Dr. John Glenn Mathis, MD is an Internal Medicine in South Bend, Indiana. Graduated from Indiana University School of Medicine in 1976, 50 years ago. Practices with Michiana Gastroenterology, Inc, a 12-clinician group and accepts Medicare assignment. Licensed in Indiana.

Years since qualifying
50
Trained at
Indiana University 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.

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Practice location Address checks out

17501 Generations Dr
South Bend, IN 46635-1589
Phone: (574) 234-0049
Fax: (574) 251-2861
Show map & directions

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

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 01026543A (IN)

Record details

NPI number1427051341
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 24, 2005
Last updated in NPPESOctober 4, 2010
Mailing address17501 Generations Dr, South Bend, IN 46635-1589

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesGASTROENTEROLOGY
Medical schoolINDIANA UNIVERSITY SCHOOL OF MEDICINE
Graduated 1976 (50 years in practice)
Group practice Michiana Gastroenterology, Inc — 12 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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