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Dr. Nerissa Ko is a neurointensivist, a neurologist trained in critical care. She specializes in caring for hospital patients undergoing treatments for conditions involving both the nervous system and blood vessels.

In her research, Ko studies outcomes for patients who suffer from subarachnoid hemorrhages, bleeding into the space between the brain and its surrounding membrane.

Ko earned her medical degree at the John A. Burns School of Medicine at the University of Hawai'i at Mānoa. She completed a residency in neurology as well as fellowships in critical care medicine and neurocritical care at UCSF Medical Center.

Ko is a member of several medical associations, including the American Heart Association and the Neurocritical Care Society.

  • Board Certifications

    American Board of Medical Specialties, Neurocritical Care, 2025

    American Board of Psychiatry and Neurology, Vascular Neurology, 2008

    American Board of Psychiatry and Neurology, Neurology, 2001

  • Fellowships

    UCSF, Vascular Neurology, 2001

  • Residencies

    UCSF, Neurology, 1999

  • Internship

    UCSF, Internal Medicine, 1996

  • Education

    University of Hawaii, John A. Burns School of Medicine, 1995

  • Languages

    English

Where I see patients (3)

    My reviews

    5.0

    Overall Experience
    38 Ratings
    About our process
    Dec 08, 2024
    Dr. Ko is the best there is!
    Nov 02, 2024
    I like Dr Ko, she is very personable and I feel that she cares about my overall health
    Nov 01, 2024
    She takes the time to listen to me and answer all my questions, suggest treatment to improve my condition
    Aug 05, 2024
    Dr. Ko is an excellent communicator, a good listener and is very practical with her guidance. She is an excellent doctor.
    Jul 01, 2024
    Provider went into great detail to ensure that I understood everything
    May 26, 2024
    Answered all concerns in detail. Took necessary time and it was not a rushed visit.
    May 24, 2024
    She's the best
    May 10, 2024
    I have already recommended her to a friend.
    Oct 24, 2023
    It was an absolute please to meet Dr Nerissa Ko. She methodically walked through the details of my options and offered to review my next Hi-Res MRI and provide feedback. She already scheduled a phone call to do so.
    Oct 10, 2023
    Dr. Ko is, wonderful. I'm very fortunate to have found her.
    Sep 15, 2023
    Excellent doctor who is supportive helpful and reasonable.

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