Quick answers
- Which hospitals does Gregory J. Downs work at?
- Medicare's official clinician data lists Gregory J. Downs at 2 hospitals: Ascension Columbia St Marys Hospital Milwaukee and Froedtert Memorial Lutheran Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory J. Downs see patients?
- Medicare's clinician data lists 4 practice locations, including Mequon, WI, Milwaukee, WI and Pleasant Prairie, WI. Call before your visit to confirm the address.
- What is Gregory J. Downs's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does Gregory J. Downs accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory J. Downs 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 Gregory J. Downs?
- (262) 243-7300, as listed in official Medicare / NPI Registry data.
- What is Gregory J. Downs's NPI number?
- 1982687810. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregory J. Downs works
Medicare's Facility Affiliation Data lists Gregory J. Downs at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ascension Columbia St Marys Hospital MilwaukeeMilwaukee, WI · Acute Care Hospital · CCN 520051
- Froedtert Memorial Lutheran HospitalMilwaukee, WI · Acute Care Hospital · CCN 520177
Practice locations
Addresses where Gregory J. Downs is enrolled with Medicare (CMS data updated 2026-10-02).
- 13111 N Port Washington RdMequon, WI 53097 (262) 243‑7300
- 8701 W Watertown PlankMilwaukee, WI 53226 (414) 805‑3666
- 8701 Watertown Plank Rd, Room 4041 MfrcMilwaukee, WI 53226 (414) 805‑3666
- 9555 76th StPleasant Prairie, WI 53158 (262) 577‑8000
Group practices
Medicare enrollment lists Gregory J. Downs as a member of these groups (CMS data updated 2026-10-02).
- The Medical College of Wisconsin Inc2,115 clinicians in the group
- Vituity-Wisconsin Anesthesia SC139 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Mequon
Clinicians with the same Medicare primary specialty in Mequon, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 1985 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1982687810 |
| 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