Quick answers
- Does Kassidy J. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Kassidy J. Williams accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Kassidy J. Williams's NPI number?
- 1134934334. 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 Kassidy J. Williams is enrolled with Medicare (CMS data updated October 2, 2026).
- 3801 Katella AveLos Alamitos, CA 90720
- 3816 Woodruff Ave, Suite 204Long Beach, CA 90808 (562) 423‑0436
Group practices
Medicare enrollment lists Kassidy J. Williams as a member of this group (CMS data updated October 2, 2026).
- Prohealth Partners, a Medical Group239 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Los Alamitos
Clinicians with the same Medicare primary specialty in Los Alamitos, CA — not a recommendation.
Other clinicians in Prohealth Partners, a Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| School | University Of Pittsburgh School Of Medicine |
| Graduation year | 2024 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1134934334 |
| 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 October 2, 2026, retrieved October 29, 2026
- 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