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

Mark S Rybczynski, DO

Individual provider Family Medicine Physician · NPI 1124113386

Mark S Rybczynski, DO is a Family Medicine Physician in St John, Indiana. Licensed in Indiana. Registered with an NPI since 2006.

Licensed in
IN
In the registry since
2006
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

9495 Keilman Ave Ste 3 And 4
St John, IN 46373-9295
Phone: (219) 365-7000
Fax: (219) 365-2609
Show map & directions

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

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 02001056A (IN)

Record details

NPI number1124113386
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedOctober 4, 2006
Last updated in NPPESDecember 21, 2011
Mailing address1040 Sierra Dr, Ste 400, Greenwood, IN 46143-7240

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