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

Ronald J Krajnik, MD

Individual provider Emergency Medicine Physician · NPI 1225072184

Ronald J Krajnik, MD is an Emergency Medicine in Appleton, Wisconsin. Graduated from Medical College of Wisconsin in 1993, 33 years ago. Practices with Thedacare, Incorporated, a 654-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
33
Trained at
Medical College of Wisconsin
Licensed in
WI
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

3925 N Gateway Dr
Appleton, WI 54913-7863
Phone: (920) 702-6371
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1405 Mill St, New London, WI 54961-2155 — (920) 531-2021

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 35701 (WI)

Record details

NPI number1225072184
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 15, 2006
Last updated in NPPESOctober 16, 2025
Certification dateOctober 16, 2025

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Also practisesINTERNAL MEDICINE
Medical schoolMEDICAL COLLEGE OF WISCONSIN
Graduated 1993 (33 years in practice)
Group practice Thedacare, Incorporated — 654 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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