Quick answers
- Which hospitals does Mark A. Welnick work at?
- Medicare's official clinician data lists Mark A. Welnick at 5 hospitals: Aurora BayCare Medical Ctr, Bellin Health Oconto Hospital, Bellin Memorial Hospital, Dickinson County Memorial Hospital and OSF St Francis Hospital and Medical Group. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark A. Welnick see patients?
- Medicare's clinician data lists 6 practice locations, including Green Bay, WI, Escanaba, MI and Iron Mountain, MI. Call before your visit to confirm the address.
- What is Mark A. Welnick's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty, and also Interventional Radiology.
- Does Mark A. Welnick accept Medicare assignment?
- Yes. Medicare's clinician data says Mark A. Welnick 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 Mark A. Welnick?
- (920) 288-8000, as listed in official Medicare / NPI Registry data.
- What is Mark A. Welnick's NPI number?
- 1255698221. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark A. Welnick works
Medicare's Facility Affiliation Data lists Mark A. Welnick 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
- Bellin Health Oconto HospitalOconto, WI · Critical Access Hospital · CCN 521356
- Bellin Memorial HospitalGreen Bay, WI · Acute Care Hospital · CCN 520049
- Dickinson County Memorial HospitalIron Mountain, MI · Acute Care Hospital · CCN 230055
- OSF St Francis Hospital and Medical GroupEscanaba, MI · Critical Access Hospital · CCN 231337
Practice locations
Addresses where Mark A. Welnick is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 2845 Greenbrier RdGreen Bay, WI 54311 (920) 288‑8000
- 3409 Ludington St, Suite 206Escanaba, MI 49829 (906) 233‑4250
- 440 Woodward AveIron Mountain, MI 49801 (906) 776‑9040
- 610 S Lincoln Rd, Bellin HealthEscanaba, MI 49829 (906) 786‑6488
- 744 S Webster AveGreen Bay, WI 54301 (920) 433‑6025
Group practices
Medicare enrollment lists Mark A. Welnick as a member of these groups (CMS data updated 2026-10-02).
- OSF Multi-Specialty Group2,114 clinicians in the group
- Bellin Memorial Hospital Inc697 clinicians in the group
- BayCare Aurora LLC194 clinicians in the group
- St Francis Hospital86 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
- Interventional Radiologyalso
Other radiologists in Green Bay
Clinicians with the same Medicare primary specialty in Green Bay, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Wisconsin School Of Medicine |
| Graduation year | 2012 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1255698221 |
| 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