Quick answers
- Where does Caroline Mason see patients?
- Medicare's clinician data lists 1 practice location in Tustin, CA. Call before your visit to confirm the address.
- What is Caroline Mason's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Caroline Mason accept Medicare assignment?
- Yes. Medicare's clinician data says Caroline Mason 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 Caroline Mason?
- (949) 466-6055, as listed in official Medicare / NPI Registry data.
- What is Caroline Mason's NPI number?
- 1134094170. 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 Caroline Mason is enrolled with Medicare (CMS data updated 2026-10-02).
- 535 E Main St, Unit 113Tustin, CA 92780 (949) 466‑6055
Group practices
Medicare enrollment lists Caroline Mason as a member of this group (CMS data updated 2026-10-02).
- Apex Health Providers5 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Tustin
Clinicians with the same Medicare primary specialty in Tustin, CA — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2025 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1134094170 |
| 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