Quick answers
- Which hospitals does Nicholas K. Callahan work at?
- Medicare's official clinician data lists Nicholas K. Callahan at 5 hospitals: Cleveland Clinic, Crystal Clinic Orthopaedic Center, Lake Health Beachwood Medical Center, Southwest General Health Center and UH Cleveland Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Nicholas K. Callahan see patients?
- Medicare's clinician data lists 2 practice locations, including Mayfield Heights, OH and Niles, OH. Call before your visit to confirm the address.
- What is Nicholas K. Callahan's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does Nicholas K. Callahan accept Medicare assignment?
- Yes. Medicare's clinician data says Nicholas K. Callahan 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 Nicholas K. Callahan?
- (844) 746-8537, as listed in official Medicare / NPI Registry data.
- What is Nicholas K. Callahan's NPI number?
- 1659783934. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Nicholas K. Callahan works
Medicare's Facility Affiliation Data lists Nicholas K. Callahan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cleveland ClinicCleveland, OH · Acute Care Hospital · CCN 360180
- Crystal Clinic Orthopaedic CenterFairlawn, OH · Acute Care Hospital · CCN 360351
- Lake Health Beachwood Medical CenterBeachwood, OH · Acute Care Hospital · CCN 360367
- Southwest General Health CenterMiddleburg Heights, OH · Acute Care Hospital · CCN 360155
- UH Cleveland Medical CenterCleveland, OH · Acute Care Hospital · CCN 360137
Practice locations
Addresses where Nicholas K. Callahan is enrolled with Medicare (CMS data updated 2026-10-02).
- 300 Allen Bradley Dr, Suite 200Mayfield Heights, OH 44124 (844) 746‑8537
- 656 Youngstown Warren RdNiles, OH 44446 (330) 505‑1362
Group practices
Medicare enrollment lists Nicholas K. Callahan as a member of these groups (CMS data updated 2026-10-02).
- Novacare Rehabilitation of Ohio Inc80 clinicians in the group
- Cleveland Orthopedic and Spine Institute, LLC17 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Mayfield Heights
Clinicians with the same Medicare primary specialty in Mayfield Heights, OH — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Lake Erie College Of Osteopathic Medicine, Erie |
| Graduation year | 2014 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1659783934 |
| 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