Skip to main content
Timothy O'Neill, MD, Cardiology, Los Alamitos, CA

Timothy F. O'Neill MD

Adult Congenital Heart Disease


Physician

Join to View Full Profile
  • 5300 Katella AveLos Alamitos, CA 90720

  • Phone+1 562-430-7533

  • Fax+1 562-430-8055

Are you Dr. O'Neill?

Join over one million U.S. Physicians, Nurse Practitioners and PAs, already on Doximity.

  • Gain access to free telehealth tools, such as our "call shielding" and one-way patient texting.
  • Connect with colleagues in the same hospital or clinic.
  • Read the latest clinical news, personalized to your specialty.

Summary

  • Dr. Timothy O'Neill, MD is a cardiologist in Los Alamitos, California. He is currently licensed to practice medicine in California.

Education & Training

  • University of California (Irvine)
    University of California (Irvine)Fellowship, Cardiovascular Disease, 1990 - 1993
  • University of California (Irvine)
    University of California (Irvine)Residency, Internal Medicine, 1987 - 1990
  • University of New Mexico School of Medicine
    University of New Mexico School of MedicineClass of 1987

Certifications & Licensure

  • CA State Medical License
    CA State Medical License 1989 - 2025
  • Cardiovascular Disease
    American Board of Internal Medicine Cardiovascular Disease