Portrait of Nerissa U. Ko
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Nerissa U. Ko, MD, MA

Neurology • Stroke
Stroke Center Parnassus
415-353-8897
Portrait of Nerissa U. Ko
Portrait of Nerissa U. Ko
ucsf logobch logo

Nerissa U. Ko, MD, MA

Neurology • Stroke
Stroke Center Parnassus
415-353-8897

On this page

About me

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.

Education & training

Board certification

  • Neurocritical Care, American Board of Medical Specialties
  • Vascular Neurology, American Board of Psychiatry/Neurology-Psychiatry
  • Neurology, American Board of Psychiatry/Neurology-Psychiatry

Fellowship

  • Vascular Neurology, UCSF Medical Center - OMAG

Residency

  • Neurology, UCSF Medical Center - OMAG

Internship

  • Internal Medicine, UCSF Medical Center - OMAG

Degree

  • MD, University of Hawaii School of Medicine

Locations

    Reviews

    Average rating

    4.9
    4.9 out of 5 Stars
    39 ratings
    About provider reviews

    Showing 1-6 of 14 reviews

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    • 5 out of 5 Stars
      December 12, 2025

      Dr. KO is brilliant, kind, considerate, fun to talk to. I feel incredibly fortunate to have her as my neurologist.

    • 5 out of 5 Stars
      November 21, 2025

      Our conversation was friendly and informative. My questions were answered and I felt she gave me as much time as I needed. I'm very appreciative of the experience.

    • 4.6 out of 5 Stars
      September 28, 2025

      Very good

    • 5 out of 5 Stars
      August 15, 2025

      Dr Ko is excellent and has encouraged me by clearly stating my condition and giving me very positive reinforcement

    • 5 out of 5 Stars
      July 6, 2025

      Love my provider

    • 5 out of 5 Stars
      May 15, 2025

      Dr. Ko is a professional, compassionate doctor. I am grateful to be her patient.

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