Quick answers
- Does Kathryn Stewart accept Medicare assignment?
- Yes. Medicare's clinician data says Kathryn Stewart 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 Kathryn Stewart's NPI number?
- 1194000778. 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 Kathryn Stewart is enrolled with Medicare (CMS data updated October 2, 2026).
- 10800 Magnolia AveRiverside, CA 92505 (951) 353‑2000
- 1801 Orange Tree Ln, Suite 100Redlands, CA 92374 (909) 880‑2979
Group practices
Medicare enrollment lists Kathryn Stewart as a member of these groups (CMS data updated October 2, 2026).
- Southern California Permanente Medical Group11,293 clinicians in the group
- Symbiosis Inc6 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Riverside
Clinicians with the same Medicare primary specialty in Riverside, CA — not a recommendation.
Other clinicians in Southern California Permanente Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2011 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1194000778 |
| 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