Quick answers
- Where does Williston Mortenson see patients?
- Medicare's clinician data lists 1 practice location in Piedmont, CA. Call before your visit to confirm the address.
- What is Williston Mortenson's specialty?
- Medicare lists Physical Therapist in Private Practice as the primary specialty.
- Does Williston Mortenson accept Medicare assignment?
- Yes. Medicare's clinician data says Williston Mortenson 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 Williston Mortenson?
- (510) 922-8872, as listed in official Medicare / NPI Registry data.
- What is Williston Mortenson's NPI number?
- 1023562881. 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 Williston Mortenson is enrolled with Medicare (CMS data updated 2026-10-02).
- 460 Boulevard Way, Suite 2dPiedmont, CA 94610 (510) 922‑8872
Group practices
Medicare enrollment lists Williston Mortenson as a member of this group (CMS data updated 2026-10-02).
- Renew Physical Therapy PC19 clinicians in the group
Specialties
Find other clinicians: Physical Therapist in Private Practice, California →
Other physical therapists in Piedmont
Clinicians with the same Medicare primary specialty in Piedmont, CA — not a recommendation.
Clinician information
| Graduation year | 2015 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1023562881 |
| 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