Quick answers
- Which hospitals does John W. Nikoleit work at?
- Medicare's official clinician data lists John W. Nikoleit at 4 hospitals: Aspirus Rhinelander Hospital, Aspirus Tomahawk Hospital, Edward Hospital and Elmhurst Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John W. Nikoleit see patients?
- Medicare's clinician data lists 5 practice locations, including Oak Park, IL, Oakbrook Terrace, IL and Rhinelander, WI. Call before your visit to confirm the address.
- What is John W. Nikoleit's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does John W. Nikoleit accept Medicare assignment?
- Yes. Medicare's clinician data says John W. Nikoleit 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 W. Nikoleit?
- (630) 317-7007, as listed in official Medicare / NPI Registry data.
- What is John W. Nikoleit's NPI number?
- 1003823212. 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 W. Nikoleit works
Medicare's Facility Affiliation Data lists John W. Nikoleit at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Aspirus Rhinelander HospitalRhinelander, WI · Acute Care Hospital · CCN 520019
- Aspirus Tomahawk HospitalTomahawk, WI · Critical Access Hospital · CCN 521313
- Edward HospitalNaperville, IL · Acute Care Hospital · CCN 140231
- Elmhurst Memorial HospitalElmhurst, IL · Acute Care Hospital · CCN 140200
Practice locations
Addresses where John W. Nikoleit is enrolled with Medicare (CMS data updated 2026-10-02).
- 1049 Lake StOak Park, IL 60301
- 1049 Lake St, Suite 201Oak Park, IL 60301
- 17 W775 Butterfield Rd, Suite 110Oakbrook Terrace, IL 60181 (630) 317‑7007
- 2251 N Shore Dr, Suite 100Rhinelander, WI 54501 (715) 361‑2000
- 444 E Timberland DrRhinelander, WI 54501 (715) 369‑2300
Group practices
Medicare enrollment lists John W. Nikoleit as a member of these groups (CMS data updated 2026-10-02).
- Aspirus Medical Group, Inc.268 clinicians in the group
- Dynamic Physical Therapy, Inc.43 clinicians in the group
- Chicago Hand and Orthopedic Surgery Centers SC2 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Oak Park
Clinicians with the same Medicare primary specialty in Oak Park, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Rush Medical College Of Rush University |
| Graduation year | 1990 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1003823212 |
| 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