About
Dr. Trevor Tsay grew up in Orange County and earned his Bachelor of Science in Biopsychology from UC Santa Barbara. He completed his medical degree at California Northstate University, College of Medicine. He began residency training in General Surgery at UC Davis Medical Center in Sacramento, then shifted focus to Family Medicine through UC Davis's satellite program in Modesto. He holds board certification in Family Medicine.
Dr. Tsay founded Amity Health with a clear goal: restore the doctor-patient relationship and rebuild family medicine around compassion and accessibility. He brings that same personal investment to every visit. Outside medicine, he follows Formula 1 racing, enjoys hockey, and spends time with his border collie, Remy.
Education & Training
Undergraduate
University of California, Santa Barbara, B.S. Biopsychology
Medical School
California Northstate University, College of Medicine
Residency
General Surgery, UC Davis Medical Center; Family Medicine, UC Davis satellite program in Modesto, CA
Certifications
Conditions Treated
Who is Dr. Tsay right for?
Dr. Tsay works well with adults and families seeking a primary care physician who handles a wide range of needs under one roof. Patients managing chronic conditions like diabetes, hypertension, asthma, or thyroid disorders benefit from his thorough, relationship-centered approach. He also serves patients needing men's health care, women's health including pap smears, and urgent care concerns. His broad clinical scope makes him a strong fit for anyone who wants consistent, accessible care from a doctor who knows them well.
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Frequently Asked Questions
Dr. Tsay practices board-certified Family Medicine with a focus on direct primary care. He covers a wide range of primary care needs including preventive care, chronic disease management, urgent care, and in-office procedures. His background includes training in both General Surgery and Family Medicine through UC Davis programs.
Dr. Tsay sees patients at Amity Health's Costa Mesa and Orange County locations. Prospective patients can reach out to the practice directly to learn about availability. Amity Health's DPC model means new members gain direct access to Dr. Tsay by call, text, email, or video.
Dr. Tsay earned his medical degree from California Northstate University, College of Medicine. He completed residency training in General Surgery at UC Davis Medical Center in Sacramento and finished his Family Medicine residency through a UC Davis satellite program in Modesto, California.
Yes, Dr. Tsay performs a range of in-office procedures at Amity Health. These include EKG, spirometry, IV therapy, and platelet rich plasma (PRP) injections. The practice also offers testosterone replacement therapy and other specialized treatments.
Amity Health members reach Dr. Tsay by call, text, video, or email at any time. This direct access is a core feature of the practice's membership model. Same or next-day in-person appointments keep wait times minimal.
Dr. Tsay treats a broad range of conditions through his Family Medicine practice. These include chronic diseases, acute and urgent care concerns, metabolic and weight management issues, and sports medicine needs. He also provides travel medicine, occupational health, and preventive care services.
Yes, Dr. Tsay grew up in Orange County and founded Amity Health there. His local roots and commitment to the community shaped his goal of making compassionate, accessible primary care available to Orange County residents.
Doctor profile last updated April 11, 2026