Quick answers
- Which hospitals does Robert Sonnenburg work at?
- Medicare's official clinician data lists Robert Sonnenburg at 3 hospitals: Aurora BayCare Medical Ctr, Aurora Medical Center Bay Area and Aurora Medical Ctr Manitowoc County. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Robert Sonnenburg see patients?
- Medicare's clinician data lists 2 practice locations, including Green Bay, WI and Marinette, WI. Call before your visit to confirm the address.
- What is Robert Sonnenburg's specialty?
- Medicare lists Otolaryngology as the primary specialty, and also Allergy/Immunology.
- Does Robert Sonnenburg accept Medicare assignment?
- Yes. Medicare's clinician data says Robert Sonnenburg 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 Robert Sonnenburg?
- (920) 327-7000, as listed in official Medicare / NPI Registry data.
- What is Robert Sonnenburg's NPI number?
- 1972588176. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Robert Sonnenburg works
Medicare's Facility Affiliation Data lists Robert Sonnenburg at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Aurora BayCare Medical CtrGreen Bay, WI · Acute Care Hospital · CCN 520193
- Aurora Medical Center Bay AreaMarinette, WI · Acute Care Hospital · CCN 520113
- Aurora Medical Ctr Manitowoc CountyTwo Rivers, WI · Acute Care Hospital · CCN 520034
Practice locations
Addresses where Robert Sonnenburg is enrolled with Medicare (CMS data updated 2026-10-02).
- 2253 W Mason StGreen Bay, WI 54307 (920) 327‑7000
- 3200 Shore DrMarinette, WI 54143 (920) 288‑8350
Group practices
Medicare enrollment lists Robert Sonnenburg as a member of this group (CMS data updated 2026-10-02).
- BayCare Clinic LLP200 clinicians in the group
Specialties
- Otolaryngologyprimary
- Allergy/Immunologyalso
Other ENT doctors in Green Bay
Clinicians with the same Medicare primary specialty in Green Bay, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1972588176 |
| 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