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

Mark E Ritter, MD

Individual provider Internal Medicine Physician · NPI 1609939511

Mark E Ritter, MD is a Family Practice in Chesterton, Indiana. Graduated from Indiana University School of Medicine in 1986, 40 years ago. Practices with Porter Physician Services LLC, a 96-clinician group and accepts Medicare assignment. Licensed in Indiana.

Years since qualifying
40
Trained at
Indiana University School of Medicine
Licensed in
IN
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

2022 Kelle Dr
Chesterton, IN 46304-8708
Phone: (219) 395-2200
Fax: (219) 983-1837
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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 01037402A (IN)

Record details

NPI number1609939511
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 19, 2006
Last updated in NPPESSeptember 14, 2020
Certification dateSeptember 14, 2020
Mailing address2022 Kelle Dr, Chesterton, IN 46304-8708

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolINDIANA UNIVERSITY SCHOOL OF MEDICINE
Graduated 1986 (40 years in practice)
Group practice Porter Physician Services Llc — 96 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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