Quick answers
- Which hospitals does Gregory J. Nelson work at?
- Medicare's official clinician data lists Gregory J. Nelson at 3 hospitals: Aurora Medical Center - Summit, Aurora Medical Center Bay Area and Aurora St Lukes Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory J. Nelson see patients?
- Medicare's clinician data lists 2 practice locations, including Milwaukee, WI and Summit, WI. Call before your visit to confirm the address.
- What is Gregory J. Nelson's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Gregory J. Nelson accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory J. Nelson 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. Nelson?
- (414) 219-3056, as listed in official Medicare / NPI Registry data.
- What is Gregory J. Nelson's NPI number?
- 1841299385. 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. Nelson works
Medicare's Facility Affiliation Data lists Gregory J. Nelson 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 - SummitSummit, WI · Acute Care Hospital · CCN 520206
- Aurora Medical Center Bay AreaMarinette, WI · Acute Care Hospital · CCN 520113
- Aurora St Lukes Medical CenterMilwaukee, WI · Acute Care Hospital · CCN 520138
Practice locations
Addresses where Gregory J. Nelson is enrolled with Medicare (CMS data updated 2026-10-02).
- 1020 N 12th StMilwaukee, WI 53233 (414) 219‑3056
- 36500 Aurora DrSummit, WI 53066 (262) 434‑5000
Group practices
Medicare enrollment lists Gregory J. Nelson as a member of this group (CMS data updated 2026-10-02).
- Aurora Medical Group, Inc.3,813 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Milwaukee
Clinicians with the same Medicare primary specialty in Milwaukee, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Minnesota Medical School |
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1841299385 |
| 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