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

Dr. Roger Oscar Gundlach, DC

Individual provider Chiropractor · NPI 1003964248

Dr. Roger Oscar Gundlach, DC is registered under Chiropractic in Ripon, Wisconsin. Graduated from Northwestern College of Chiropractic in 1987, 39 years ago. Licensed in Wisconsin.

Years since qualifying
39
Trained at
Northwestern College of Chiropractic
Licensed in
WI
In the registry since
2007
What do these letters mean?
DC — Doctor of Chiropractic
A licensed chiropractor.

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Practice location Address checks out

315 Mount Zion Dr
Ripon, WI 54971-1713 Not confirmed with CMS for 19 years — call before visiting
Phone: (920) 745-3020
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Chiropractor (primary) Taxonomy 111N00000X · Licence 2307-012 (WI)

Record details

NPI number1003964248
Entity typeIndividual (Type 1)
GenderMale
Credentials DC
Sole proprietorNo
NPI enumeratedJanuary 6, 2007
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyCHIROPRACTIC
Medical schoolNORTHWESTERN COLLEGE OF CHIROPRACTIC
Graduated 1987 (39 years in practice)
Accepts Medicare assignment Not indicated

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 patients32
Services billed 189 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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.

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