Quick answers
- Does Frank J. Zimmerman accept Medicare assignment?
- Yes. Medicare's clinician data says Frank J. Zimmerman 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 Frank J. Zimmerman see?
- In 2024, CMS data shows 22 Original Medicare patients and 128 services for Frank J. Zimmerman. This counts Original Medicare only and measures volume, not quality.
- What is Frank J. Zimmerman's NPI number?
- 1174673123. 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 Frank J. Zimmerman, 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 | 22 |
|---|---|
| Services billed to Medicare | 128 |
| Different services or procedures | 24 |
| Participating Medicare provider | Yes |
| Average age of these patients | 42 |
Most frequent services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)18 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).
- Heart failure50%
Practice locations
Addresses where Frank J. Zimmerman is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 10; the Medicare profile lists all.
- 1675 Dempster StPark Ridge, IL 60068 (847) 318‑9067
- 1675 Dempster St, Suite Y2 206Park Ridge, IL 60068 (815) 588‑5012
- 1675 W Dempster St, Fl 3Park Ridge, IL 60068 (847) 318‑9330
- 1775 Dempster StPark Ridge, IL 60068
- 17805 Halsted StHomewood, IL 60430 (773) 702‑1000
Group practices
Medicare enrollment lists Frank J. Zimmerman as a member of these groups (CMS data updated October 2, 2026).
- Advocate Health and Hospitals Corporation3,118 clinicians in the group
- University of Chicago1,712 clinicians in the group
Specialties
- Pediatric Medicineprimary
- Cardiac Surgeryalso
Other pediatricians in Park Ridge
Clinicians with the same Medicare primary specialty in Park Ridge, IL — not a recommendation.
Other clinicians in Advocate Health and Hospitals Corporation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northwestern University Feinberg Medical School |
| 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) | 1174673123 |
| 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
- 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