Quick answers
- Does Alex Zacharias accept Medicare assignment?
- Yes. Medicare's clinician data says Alex Zacharias 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 Alex Zacharias see?
- In 2024, CMS data shows 535 Original Medicare patients and 2,992 services for Alex Zacharias. This counts Original Medicare only and measures volume, not quality.
- What is Alex Zacharias's NPI number?
- 1598793598. 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 Alex Zacharias, 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 | 535 |
|---|---|
| Services billed to Medicare | 2,992 |
| Different services or procedures | 73 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)354 services
- Ultrasound measurement of bladder capacity after voiding (51798)191 services
- Leuprolide acetate (for depot suspension), 7.5 mg (J9217)153 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)113 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)72 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 cholesterol75%
- High blood pressure73%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)42%
- Arthritis38%
- Ischemic heart disease30%
- Chronic kidney disease30%
Hospitals where Alex Zacharias works
Medicare's Facility Affiliation Data lists Alex Zacharias 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 Washington CountyHartford, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520038
- Aurora St Lukes Medical CenterMilwaukee, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520138
Practice locations
Addresses where Alex Zacharias is enrolled with Medicare (CMS data updated October 2, 2026).
- 1032 E Sumner StHartford, WI 53027 (262) 673‑2300
- 12203 N Corporate PkwyMequon, WI 53092
- 2900 W Oklahoma AveMilwaukee, WI 53215 (414) 649‑6000
- 3003 W Good Hope RdMilwaukee, WI 53209 (414) 352‑3100
Group practices
Medicare enrollment lists Alex Zacharias as a member of this group (CMS data updated October 2, 2026).
- Aurora Advanced Healthcare, Inc.1,124 clinicians in the group
Specialties
- Urologyprimary
Other urologists in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Other clinicians in Aurora Advanced Healthcare, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Illinois College Of Med (chi/peor/rock/chm-Urb) |
| Graduation year | 1992 (34 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1598793598 |
| 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