Quick answers
- Where does Treesa Williamson see patients?
- Medicare's clinician data lists 1 practice location in Harrisburg, PA. Call before your visit to confirm the address.
- What is Treesa Williamson's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Treesa Williamson accept Medicare assignment?
- Yes. Medicare's clinician data says Treesa Williamson 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 Treesa Williamson?
- (415) 360-3348, as listed in official Medicare / NPI Registry data.
- What is Treesa Williamson's NPI number?
- 1598159824. 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 Treesa Williamson is enrolled with Medicare (CMS data updated 2026-10-02).
- 4203 Union Deposit Rd, Suite 1098Harrisburg, PA 17111 (415) 360‑3348
Group practices
Medicare enrollment lists Treesa Williamson as a member of this group (CMS data updated 2026-10-02).
- Brightside Medical PC67 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Harrisburg
Clinicians with the same Medicare primary specialty in Harrisburg, PA — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2014 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1598159824 |
| 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