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

John A Feilbach, MD

Individual provider Internal Medicine Physician · NPI 1538191168

John A Feilbach, MD practises Internal Medicine in Grafton, Wisconsin. Qualified in 1991, 35 years ago. Practices with Aurora Advanced Healthcare, Inc, a 1,101-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
35
Licensed in
WI
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

215 Washington St
Grafton, WI 53024
Phone: (262) 375-3700
Fax: (262) 376-6020
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 33495 (WI)

Record details

NPI number1538191168
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 6, 2006
Last updated in NPPESSeptember 24, 2026
Certification dateSeptember 24, 2026

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1991 (35 years in practice)
Group practice Aurora Advanced Healthcare, Inc. — 1101 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients119
Services billed 157 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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.

Colleagues at Aurora Advanced Healthcare, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1101 clinicians in the practice; 12 are shown here.

Other providers in Grafton