Nerissa U. Ko

Nerissa U. Ko

MD, MA

Neurointensivist

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

  • Degree

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

  • Languages

    English

Selected research

See all research

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