Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1134094170 Individual Practitioner Female Practitioner

Caroline Mason , PA-C

Physician Assistant • Tustin, CA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Caroline Mason, PA-C is a certified Physician Assistant practicing in Tustin, CA. With approximately 1 years of clinical experience since completing medical education in 2025, Caroline Mason delivers high-quality medical care to the local community at 535 E MAIN ST.

Caroline Mason is affiliated with Apex Health Providers and accepts Medicare assignment.

Practice Location & Contact Primary Location

Practice Address

535 E Main St

Tustin, CA 927804453

Telephone 9494666055
Fax 9492817900
Associated Practice Facility / Clinic

Medicare Profile & Education

Medical School

Other

Graduation Year

2025

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Physician Assistant in Tustin, CA

Rising Specialist (<5 Yrs)
Practitioner Clinical Experience
1 Yrs -5.7 yrs vs City Avg
City Avg: 6.7 Yrs
State Avg: 11.5 Yrs
Regional Practice Density
53 Specialists

Practicing in Tustin, CA (14617 Statewide)

Telehealth Adoption Rate
11.3% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Mason (1 Years) 1 Yrs
Tustin Specialty Average (6.7 Years) 6.7 Yrs

Medical Specialties & State Licenses

CMS Verified: 2026-01-06
Physician Assistant Primary Specialty

NUCC Taxonomy Code: 363A00000X

A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.

Hospital & Practice Group Affiliations

Apex Health Providers

535 E Main St, Tustin, CA 927804454

Phone: 9494666055

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

1 Associated Practitioners
Dr. Monika Mathur , MD

Psychiatry & Neurology - Neurology with Special Qualifications in Child Neurology

NPI 1558669002

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

8 Historical Events
📍
Updated Practice Location January 06, 2026

Registered at 535 E MAIN ST, TUSTIN, CA 927804453 (Tel: 9494666055)

📍
Updated Business Mailing Address January 06, 2026

Registered at 535 E MAIN ST, TUSTIN, CA 927804453 (Tel: 9494666055)

NPI Profile Active October 08, 2025

NPI status registered as active in NPPES database

📍
Updated Practice Location October 08, 2025

Registered at 16463 KNOLLWOOD DR, GRANADA HILLS, CA 913441805 (Tel: 8187383476)

📍
Updated Business Mailing Address October 08, 2025

Registered at 16463 KNOLLWOOD DR, GRANADA HILLS, CA 913441805

👤
Provider Name / Credentials Updated October 08, 2025

Recorded as CAROLINE MASON, PA-C

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) October 08, 2025

Physician Assistant

🟢
Initial NPI Registration & Enumeration October 08, 2025

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1134094170
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: October 08, 2025
Last Update: January 06, 2026
Sole Proprietor: Yes

Mailing Address

535 E Main St

Tustin, CA 927804453

Phone: 9494666055

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.