Quick answers
- Does Cori A. McMahon accept Medicare assignment?
- Yes. Medicare's clinician data says Cori A. McMahon 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 Cori A. McMahon's NPI number?
- 1356418123. 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 Cori A. McMahon is enrolled with Medicare (CMS data updated October 2, 2026).
- 23781 MaquinaMission Viejo, CA 92691 (888) 988‑2800
- 5475 E La Palma AveAnaheim, CA 92807 (714) 279‑6088
Group practices
Medicare enrollment lists Cori A. McMahon as a member of this group (CMS data updated October 2, 2026).
- Southern California Permanente Medical Group11,293 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Mission Viejo
Clinicians with the same Medicare primary specialty in Mission Viejo, 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 |
|---|---|
| School | University Of Southern California Keck School Of Medicine |
| Graduation year | 1997 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1356418123 |
| 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