Quick answers
- Which hospitals does Greg A. Lietz work at?
- Medicare's official clinician data lists Greg A. Lietz at 1 hospital: Aurora Medical Center Washington County. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Greg A. Lietz 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 Greg A. Lietz's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Greg A. Lietz accept Medicare assignment?
- Yes. Medicare's clinician data says Greg A. Lietz 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 Greg A. Lietz?
- (262) 673-2300, as listed in official Medicare / NPI Registry data.
- What is Greg A. Lietz's NPI number?
- 1548345762. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Greg A. Lietz works
Medicare's Facility Affiliation Data lists Greg A. Lietz at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Aurora Medical Center Washington CountyHartford, WI · Acute Care Hospital · CCN 520038
Practice locations
Addresses where Greg A. Lietz 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 Greg A. Lietz as a member of this group (CMS data updated 2026-10-02).
- Aurora Advanced Healthcare, Inc.1,124 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Hartford
Clinicians with the same Medicare primary specialty in Hartford, WI — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2006 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548345762 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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