Quick answers
- Does Neil J. Rennick accept Medicare assignment?
- Yes. Medicare's clinician data says Neil J. Rennick 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 Neil J. Rennick see?
- In 2024, CMS data shows 46 Original Medicare patients and 475 services for Neil J. Rennick. This counts Original Medicare only and measures volume, not quality.
- What is Neil J. Rennick's NPI number?
- 1508062043. 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 Neil J. Rennick, 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 | 46 |
|---|---|
| Services billed to Medicare | 475 |
| Different services or procedures | 8 |
| 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)227 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)199 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)30 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)14 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%
- Arthritis65%
- Diabetes54%
- Ischemic heart disease33%
Hospitals where Neil J. Rennick works
Medicare's Facility Affiliation Data lists Neil J. Rennick 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.
- Waukesha Memorial HospitalWaukesha, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520008
Practice locations
Addresses where Neil J. Rennick is enrolled with Medicare (CMS data updated October 2, 2026).
- 123 Wolf Run, Suite 5Mukwonago, WI 53149 (262) 642‑7313
Specialties
Other family doctors in Mukwonago
Clinicians with the same Medicare primary specialty in Mukwonago, WI — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 1983 (43 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1508062043 |
| 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