Quick answers
- Where does John A. Feilbach see patients?
- Medicare's clinician data lists 1 practice location in Mequon, WI. Call before your visit to confirm the address.
- What is John A. Feilbach's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does John A. Feilbach accept Medicare assignment?
- Yes. Medicare's clinician data says John A. Feilbach accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is John A. Feilbach's NPI number?
- 1538191168. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where John A. Feilbach is enrolled with Medicare (CMS data updated 2026-10-02).
- 12203 N Corporate PkwyMequon, WI 53092
Group practices
Medicare enrollment lists John A. Feilbach as a member of this group (CMS data updated 2026-10-02).
- Aurora Advanced Healthcare, Inc.1,124 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Mequon
Clinicians with the same Medicare primary specialty in Mequon, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538191168 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians