Quick answers
- Where does William McClellan see patients?
- Medicare's clinician data lists 2 practice locations, including Atwater, CA and Merced, CA. Call before your visit to confirm the address.
- What is William McClellan's specialty?
- Medicare lists Physical Therapist in Private Practice as the primary specialty.
- Does William McClellan accept Medicare assignment?
- Yes. Medicare's clinician data says William McClellan 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 McClellan?
- (209) 726-9000, as listed in official Medicare / NPI Registry data.
- What is William McClellan's NPI number?
- 1538651997. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where William McClellan is enrolled with Medicare (CMS data updated 2026-10-02).
- 3009 Stratofortress AveAtwater, CA 95301 (209) 726‑9000
- 3379 G StMerced, CA 95340 (209) 726‑9000
Group practices
Medicare enrollment lists William McClellan as a member of this group (CMS data updated 2026-10-02).
- Pain Management Services and Physical Therapy Inc7 clinicians in the group
Specialties
Find other clinicians: Physical Therapist in Private Practice, California →
Other physical therapists in Atwater
Clinicians with the same Medicare primary specialty in Atwater, CA — not a recommendation.
Clinician information
| Credential | PT |
|---|---|
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538651997 |
| 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
- 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