Medical Definition of Rule out

  • Medical Author:
    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

Rule out: Term used in medicine, meaning to eliminate or exclude something from consideration. For example, a normal chest x-ray may "rule out" pneumonia.

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Reviewed on 12/21/2018

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