Quick answers
- Which hospitals does William S. Marsh Iii work at?
- Medicare's official clinician data lists William S. Marsh Iii at 3 hospitals: AdventHealth Central Texas, Coryell Memorial Hospital and Seton Medical Center Harker Heights. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William S. Marsh Iii see patients?
- Medicare's clinician data lists 1 practice location in Killeen, TX. Call before your visit to confirm the address.
- What is William S. Marsh Iii's specialty?
- Medicare lists Physical Medicine and Rehabilitation as the primary specialty, and also Pain Management.
- Does William S. Marsh Iii accept Medicare assignment?
- Yes. Medicare's clinician data says William S. Marsh Iii 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 William S. Marsh Iii offer telehealth?
- Medicare's clinician data says William S. Marsh Iii offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for William S. Marsh Iii?
- (254) 519-1900, as listed in official Medicare / NPI Registry data.
- What is William S. Marsh Iii's NPI number?
- 1730162827. 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 S. Marsh Iii works
Medicare's Facility Affiliation Data lists William S. Marsh Iii at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- AdventHealth Central TexasKilleen, TX · Acute Care Hospital · CCN 450152
- Coryell Memorial HospitalGatesville, TX · Critical Access Hospital · CCN 451379
- Seton Medical Center Harker HeightsHarker Heights, TX · Acute Care Hospital · CCN 670080
Practice locations
Addresses where William S. Marsh Iii is enrolled with Medicare (CMS data updated 2026-10-02).
- 5320 E Central Texas Expy, Suite 105Killeen, TX 76543 (254) 519‑1900
Group practices
Medicare enrollment lists William S. Marsh Iii as a member of this group (CMS data updated 2026-10-02).
- William S Marsh III, DO, PA3 clinicians in the group
Specialties
Find other Physical Medicine and Rehabilitation doctors in Texas →
Other rehabilitation doctors in Texas
Clinicians with the same Medicare primary specialty in Texas — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | At Still University Of Health Sciences, College Of Osteo Med, Kirksville |
| Graduation year | 1989 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1730162827 |
| 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