Quick answers
- Which hospitals does Jay L. Koyner work at?
- Medicare's official clinician data lists Jay L. Koyner at 1 hospital: The University of Chicago Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jay L. Koyner see patients?
- Medicare's clinician data lists 1 practice location in Chicago, IL. Call before your visit to confirm the address.
- What is Jay L. Koyner's specialty?
- Medicare lists Nephrology as the primary specialty.
- Does Jay L. Koyner accept Medicare assignment?
- Yes. Medicare's clinician data says Jay L. Koyner accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Jay L. Koyner offer telehealth?
- Medicare's clinician data says Jay L. Koyner offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Jay L. Koyner?
- (773) 702-1000, as listed in official Medicare / NPI Registry data.
- What is Jay L. Koyner's NPI number?
- 1275656340. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jay L. Koyner works
Medicare's Facility Affiliation Data lists Jay L. Koyner at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- The University of Chicago Medical CenterChicago, IL · Acute Care Hospital · CCN 140088
Practice locations
Addresses where Jay L. Koyner is enrolled with Medicare (CMS data updated 2026-10-02).
- 5841 S Maryland AveChicago, IL 60637 (773) 702‑1000
Group practices
Medicare enrollment lists Jay L. Koyner as a member of these groups (CMS data updated 2026-10-02).
- University of Chicago1,712 clinicians in the group
- The University of Chicago Medical Center915 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in Chicago
Clinicians with the same Medicare primary specialty in Chicago, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York At Stony Brook, School Of Medicine |
| Graduation year | 2001 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1275656340 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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