Quick answers
- Which hospitals does John J. Karl work at?
- Medicare's official clinician data lists John J. Karl at 2 hospitals: Franciscan Health Dyer and Franciscan Health Olympia & Chicago Heights. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John J. Karl see patients?
- Medicare's clinician data lists 2 practice locations, including Dyer, IN and Olympia Fields, IL. Call before your visit to confirm the address.
- What is John J. Karl's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does John J. Karl accept Medicare assignment?
- Yes. Medicare's clinician data says John J. Karl 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.
- What is the phone number for John J. Karl?
- (219) 852-2518, as listed in official Medicare / NPI Registry data.
- What is John J. Karl's NPI number?
- 1487701728. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John J. Karl works
Medicare's Facility Affiliation Data lists John J. Karl at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Franciscan Health DyerDyer, IN · Acute Care Hospital · CCN 150090
- Franciscan Health Olympia & Chicago HeightsOlympia Fields, IL · Acute Care Hospital · CCN 140172
Practice locations
Addresses where John J. Karl is enrolled with Medicare (CMS data updated 2026-10-02).
- 24 Joliet St, Unit 302Dyer, IN 46311 (219) 852‑2518
- 3700 W 203rd St, Suite 202Olympia Fields, IL 60461 (708) 679‑2120
Group practices
Medicare enrollment lists John J. Karl as a member of these groups (CMS data updated 2026-10-02).
- Franciscan Physician Network1,170 clinicians in the group
- Specialty Physicians of Illinois LLC102 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Dyer
Clinicians with the same Medicare primary specialty in Dyer, IN — not a recommendation.
Clinician information
| Graduation year | 2018 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1487701728 |
| 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