Quick answers
- Does Joseph F. Zaker accept Medicare assignment?
- Yes. Medicare's clinician data says Joseph F. Zaker 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 Joseph F. Zaker see?
- In 2024, CMS data shows 309 Original Medicare patients and 542 services for Joseph F. Zaker. This counts Original Medicare only and measures volume, not quality.
- What is Joseph F. Zaker's NPI number?
- 1942407994. 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 Joseph F. Zaker, 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 | 309 |
|---|---|
| Services billed to Medicare | 542 |
| Different services or procedures | 8 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient complete exam of visual system (92014)249 services
- Established patient problem focused exam of visual system (92012)108 services
- Photography of the retina (92250)78 services
- New patient complete exam of visual system (92004)35 services
- Imaging of retina (92134)33 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 pressure72%
- Arthritis39%
- Diabetes25%
- Ischemic heart disease24%
- Anxiety17%
Practice locations
Addresses where Joseph F. Zaker is enrolled with Medicare (CMS data updated October 2, 2026).
- 9602 S Roberts RdHickory Hills, IL 60457 (708) 237‑2020
Group practices
Medicare enrollment lists Joseph F. Zaker as a member of this group (CMS data updated October 2, 2026).
- Family Vision Center, Inc.2 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Other clinicians in Family Vision Center, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| School | Illinois College Of Optometry At Chicago |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1942407994 |
| 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