Quick answers
- Where does Gary W. Stewart see patients?
- Medicare's clinician data lists 2 practice locations, including Hartford, WI and Mequon, WI. Call before your visit to confirm the address.
- What is Gary W. Stewart's specialty?
- Medicare lists General Surgery as the primary specialty.
- Does Gary W. Stewart accept Medicare assignment?
- Yes. Medicare's clinician data says Gary W. Stewart 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 the phone number for Gary W. Stewart?
- (262) 673-2300, as listed in official Medicare / NPI Registry data.
- What is Gary W. Stewart's NPI number?
- 1003848458. 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 Gary W. Stewart is enrolled with Medicare (CMS data updated 2026-10-02).
- 1032 E Sumner StHartford, WI 53027 (262) 673‑2300
- 12203 N Corporate PkwyMequon, WI 53092
Group practices
Medicare enrollment lists Gary W. Stewart as a member of this group (CMS data updated 2026-10-02).
- Aurora Advanced Healthcare, Inc.1,124 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Hartford
Clinicians with the same Medicare primary specialty in Hartford, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical School At Houston |
| Graduation year | 1979 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1003848458 |
| 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