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

Timothy F. O'Neill MD

Cardiology•Los Alamitos, CA

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

Join Doximity

As a Doximity member, you’ll join more than three million U.S. healthcare professionals—including 85+% of physicians, and 2/3 of all NPs and PAs—in a private, secure network.

  • 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.
    You already have 1 invite waiting!
  • Read the latest clinical news, personalized to your specialty.
Join DoximityAlready have an account?

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

Awards, Honors, & Recognition

  • CMS Meaningful Use Stage 1 Certification eClinicalWorks, eClinicalWorks, LLC, 2013, 2015-2017
  • CMS Meaningful Use Stage 2 Certification eClinicalWorks, eClinicalWorks, LLC, 2013, 2015-2017

Dr. Timothy O'Neill, Dr. Timothy O'Neill, MD, Dr. T O'Neill, Dr. Timothy F. O'Neill