Quick answers
- Which hospitals does William W. Chang work at?
- Medicare's official clinician data lists William W. Chang at 4 hospitals: Mercer County Joint Township Community Hospital, Mercy Health St Ritas Medical Center, Mercy St Vincent Medical Center and Ohio State University State Health System. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William W. Chang see patients?
- Medicare's clinician data lists 1 practice location in Lima, OH. Call before your visit to confirm the address.
- What is William W. Chang's specialty?
- Medicare lists Physical Medicine and Rehabilitation as the primary specialty.
- Does William W. Chang accept Medicare assignment?
- Yes. Medicare's clinician data says William W. Chang 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 William W. Chang?
- (419) 996-5224, as listed in official Medicare / NPI Registry data.
- What is William W. Chang's NPI number?
- 1245223619. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William W. Chang works
Medicare's Facility Affiliation Data lists William W. Chang at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercer County Joint Township Community HospitalColdwater, OH · Acute Care Hospital · CCN 360058
- Mercy Health St Ritas Medical CenterLima, OH · Acute Care Hospital · CCN 360066
- Mercy St Vincent Medical CenterToledo, OH · Acute Care Hospital · CCN 360112
- Ohio State University State Health SystemColumbus, OH · Acute Care Hospital · CCN 360085
Practice locations
Addresses where William W. Chang is enrolled with Medicare (CMS data updated 2026-10-02).
- 770 W High St, Suite 160Lima, OH 45801 (419) 996‑5224
Group practices
Medicare enrollment lists William W. Chang as a member of this group (CMS data updated 2026-10-02).
- Mercy Health Physicians Lima Specialty Care LLC253 clinicians in the group
Specialties
Find other Physical Medicine and Rehabilitation doctors in Ohio →
Other rehabilitation doctors in Lima
Clinicians with the same Medicare primary specialty in Lima, OH — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York Downstate Medical Center |
| Graduation year | 1990 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1245223619 |
| 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