Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

John Ganser, DO

Individual provider Family Medicine Physician · NPI 1922035658

John Ganser, DO is registered under Family Practice in Appleton, Wisconsin. Graduated from Midwestern University, Chicago College of Osteopathic Med in 1996, 30 years ago. Practices with Thedacare, Incorporated, a 654-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
30
Trained at
Midwestern University, Chicago College of Osteopathic Med
Licensed in
WI
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

2809 N Park Drive Ln
Appleton, WI 54911-1603 Not confirmed with CMS for 19 years — call before visiting
Phone: (920) 738-4600
Fax: (920) 738-4792
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 38921 (WI)

Record details

NPI number1922035658
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJune 27, 2006
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolMIDWESTERN UNIVERSITY, CHICAGO COLLEGE OF OSTEOPATHIC MED
Graduated 1996 (30 years in practice)
Group practice Thedacare, Incorporated — 654 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations9 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of skin lesions 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients246
Services billed 1,744 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Thedacare, Incorporated

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 654 clinicians in the practice; 12 are shown here.

Other providers in Appleton