Quick answers
- Where does William J. Harrington see patients?
- Medicare's clinician data lists 3 practice locations, including Westford, MA and Waltham, MA. Call before your visit to confirm the address.
- What is William J. Harrington's specialty?
- Medicare lists Physical Therapist in Private Practice as the primary specialty.
- Does William J. Harrington accept Medicare assignment?
- Yes. Medicare's clinician data says William J. Harrington 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 J. Harrington?
- (978) 392-0483, as listed in official Medicare / NPI Registry data.
- What is William J. Harrington's NPI number?
- 1043299902. 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 J. Harrington is enrolled with Medicare (CMS data updated 2026-10-02).
- 334 Littleton Rd, Suite 2Westford, MA 01886 (978) 392‑0483
- 840 Winter StWaltham, MA 02451
- 840 Winter St, Attn Pro Sports TherapyWaltham, MA 02451
Group practices
Medicare enrollment lists William J. Harrington as a member of this group (CMS data updated 2026-10-02).
- Pro Sports Therapy Inc13 clinicians in the group
Specialties
Find other clinicians: Physical Therapist in Private Practice, Massachusetts →
Other physical therapists in Westford
Clinicians with the same Medicare primary specialty in Westford, MA — not a recommendation.
Clinician information
| Credential | PT |
|---|---|
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1043299902 |
| 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