Quick answers
- Does Westley D. Zimmer accept Medicare assignment?
- Yes. Medicare's clinician data says Westley D. Zimmer 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 Westley D. Zimmer see?
- In 2024, CMS data shows 2,776 Original Medicare patients and 5,317 services for Westley D. Zimmer. This counts Original Medicare only and measures volume, not quality.
- What is Westley D. Zimmer's NPI number?
- 1023465150. 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 Westley D. Zimmer, 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 | 2,776 |
|---|---|
| Services billed to Medicare | 5,317 |
| Different services or procedures | 231 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- X-ray of chest, 1 view (71045)1,090 services
- X-ray of chest, 2 views (71046)367 services
- Ct scan head or brain without contrast (70450)333 services
- Dxa bone density measurement of hip, pelvis, spine (77080)220 services
- Ct scan of abdomen and pelvis without contrast (74176)188 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%
- Arthritis59%
- Ischemic heart disease48%
- Diabetes40%
- Chronic kidney disease37%
Hospitals where Westley D. Zimmer works
Medicare's Facility Affiliation Data lists Westley D. Zimmer 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.
- Alexian Brothers Medical Center 1Elk Grove Village, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140258
- Northwest Community Hospital 1Arlington Heights, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140252
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140242
- St Alexius Medical CenterHoffman Estates, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140290
Practice locations
Addresses where Westley D. Zimmer is enrolled with Medicare (CMS data updated October 2, 2026).
- 1041 W Stearns RdBartlett, IL 60103 (630) 716‑7500
- 1555 Barrington RdHoffman Estates, IL 60169
- 1786 Moon Lake BlvdHoffman Est, IL 60194 (847) 755‑8208
- 361 W Golf RdSchaumburg, IL 60195 (847) 952‑7447
Group practices
Medicare enrollment lists Westley D. Zimmer as a member of this group (CMS data updated October 2, 2026).
- Bonaventure Medical Foundation LLC167 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Bartlett
Clinicians with the same Medicare primary specialty in Bartlett, IL — not a recommendation.
Other clinicians in Bonaventure Medical Foundation LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | R Franklin University Of Med & Sci/chicago Medical School |
| Graduation year | 2016 (10 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1023465150 |
| 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