Quick answers
- Does Christopher J. Zellmer accept Medicare assignment?
- Yes. Medicare's clinician data says Christopher J. Zellmer accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Christopher J. Zellmer see?
- In 2024, CMS data shows 3,030 Original Medicare patients and 6,787 services for Christopher J. Zellmer. This counts Original Medicare only and measures volume, not quality.
- What is Christopher J. Zellmer's NPI number?
- 1346275435. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Christopher J. Zellmer, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 3,030 |
|---|---|
| Services billed to Medicare | 6,787 |
| Different services or procedures | 115 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)2,656 services
- X-ray of chest, 1 view (71045)601 services
- Ct scan head or brain without contrast (70450)318 services
- X-ray of chest, 2 views (71046)294 services
- Ct scan of abdomen and pelvis with contrast (74177)169 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis61%
- Chronic kidney disease37%
- Ischemic heart disease36%
- Depression32%
Hospitals where Christopher J. Zellmer works
Medicare's Facility Affiliation Data lists Christopher J. Zellmer at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Aurora Medical CenterGrafton, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520207
- Aurora Medical Center - SummitSummit, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520206
- Aurora Medical Center KenoshaKenosha, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520189
- Aurora St Lukes Medical CenterMilwaukee, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520138
- West Allis Memorial HospitalWest Allis, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520139
Practice locations
Addresses where Christopher J. Zellmer is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 22; the Medicare profile lists all.
- 1055 N Mayfair RdWauwatosa, WI 53226 (414) 476‑8450
- 1055 N Mayfair Rd, Suite 300Wauwatosa, WI 53226 (414) 476‑8450
- 1061 E Commerce BoulevardSlinger, WI 53086 (262) 644‑2900
- 1100 Gateway CtWest Bend, WI 53095 (262) 335‑8600
- 12203 N Corporate PkwyMequon, WI 53092
Group practices
Medicare enrollment lists Christopher J. Zellmer as a member of these groups (CMS data updated October 2, 2026).
- Aurora Medical Group, Inc.3,813 clinicians in the group
- Aurora Advanced Healthcare, Inc.1,124 clinicians in the group
- Lakeshore Medical Clinic LLC379 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Wauwatosa
Clinicians with the same Medicare primary specialty in Wauwatosa, WI — not a recommendation.
Other clinicians in Aurora Medical Group, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 1990 (36 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1346275435 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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