Nerissa Ko, MD


Dr. Nerissa Ko is a neurointensivist, or a neurologist with critical care training, who specializes in the care of hospital patients undergoing neurovascular treatment. She earned her medical degree at John A. Burns School of Medicine at the University of Hawaii. She completed a residency in neurology and fellowships in critical care medicine and neurocritical care at UCSF Medical Center She is a member of several medical associations, including the American Heart Association, Neurocritical Care Society and Bay Area Stroke Society. Ko's research interests include the study of clinical outcomes of patients who suffer from subarchnoid hemorrhages.


HHT Center of Excellence
185 Berry St., Suite 180, Lobby 6
San Francisco, CA 94107
Phone: (415) 353-8867
Fax: (415) 353-4503

Hours: Monday to Friday,
8 a.m. – 4:30 p.m.

Neurovascular Disease and Stroke Center
400 Parnassus Ave., Eighth Floor
San Francisco, CA 94143
Phone: (415) 353-8897
Fax: (415) 353-8705

Hours: Monday to Friday
8:30 a.m. – 5 p.m.

Conditions & Treatments

Board Certification

Neurology, American Board of Psychiatry and Neurology
Vascular Neurology, American Board of Psychiatry and Neurology

Academic Title


More about Nerissa Ko


University of Hawaii 1995


UCSF Neurology Department, Neurology 1999


UCSF, Critical Care Medicine 2000
UCSF, Neurovascular/Critical Care 2001

Selected Research and Publications

  1. Ryu J, Ko N, Hu X, Shadden SC. Numerical Investigation of Vasospasm Detection by Extracranial Blood Velocity Ratios. Cerebrovasc Dis. 2017; 43(5-6):214-222.
  2. Arroyo-Palacios J, Rudz M, Fidler R, Smith W, Ko N, Park S, Bai Y, Hu X. Characterization of Shape Differences Among ICP Pulses Predicts Outcome of External Ventricular Drainage Weaning Trial. Neurocrit Care. 2016 Dec; 25(3):424-433.
  3. van 't Hof FN, Ruigrok YM, Lee CH, Ripke S, Anderson G, de Andrade M, Baas AF, Blankensteijn JD, Böttinger EP, Bown MJ, Broderick J, Bijlenga P, Carrell DS, Crawford DC, Crosslin DR, Ebeling C, Eriksson JG, Fornage M, Foroud T, von Und Zu Fraunberg M, Friedrich CM, Gaál EI, Gottesman O, Guo DC, Harrison SC, Hernesniemi J, Hofman A, Inoue I, Jääskeläinen JE, Jones GT, Kiemeney LA, Kivisaari R, Ko N, Koskinen S, Kubo M, Kullo IJ, Kuivaniemi H, Kurki MI, Laakso A, Lai D, Leal SM, Lehto H, LeMaire SA, Low SK, Malinowski J, McCarty CA, Milewicz DM, Mosley TH, Nakamura Y, Nakaoka H, Niemelä M, Pacheco J, Peissig PL, Pera J, Rasmussen-Torvik L, Ritchie MD, Rivadeneira F, van Rij AM, Santos-Cortez RL, Saratzis A, Slowik A, Takahashi A, Tromp G, Uitterlinden AG, Verma SS, Vermeulen SH, Wang GT, Han B, Rinkel GJ, de Bakker PI. Shared Genetic Risk Factors of Intracranial, Abdominal, and Thoracic Aneurysms. J Am Heart Assoc. 2016 Jul 14; 5(7).
  4. Threlkeld ZD, Kottapally M, Aysenne A, Ko N. Continuous Qualitative Electroencephalography as a Noninvasive Neuromonitor. Neurohospitalist. 2016 Oct; 6(4):157-160.
  5. Zhu C, Haraldsson H, Tian B, Meisel K, Ko N, Lawton M, Grinstead J, Ahn S, Laub G, Hess C, Saloner D. High resolution imaging of the intracranial vessel wall at 3 and 7 T using 3D fast spin echo MRI. MAGMA. 2016 Jun; 29(3):559-70.
  6. Edwards NJ, Grill MF, Choi HA, Ko NU. Frequency and Risk Factors for Cerebral Arterial Disease in a HIV/AIDS Neuroimaging Cohort. Cerebrovasc Dis. 2016; 41(3-4):170-6.
  7. Chow FC, Boscardin WJ, Mills C, Ko N, Carroll C, Price RW, Deeks S, Sorond FA, Hsue PY. Cerebral vasoreactivity is impaired in treated, virally suppressed HIV-infected individuals. AIDS. 2016 Jan 02; 30(1):45-55.
  8. Smith WS, Browne JL, Ko NU. Cranial Accelerometry Can Detect Cerebral Vasospasm Caused by Subarachnoid Hemorrhage. Neurocrit Care. 2015 Dec; 23(3):364-9.
  9. Farlow JL, Lin H, Sauerbeck L, Lai D, Koller DL, Pugh E, Hetrick K, Ling H, Kleinloog R, van der Vlies P, Deelen P, Swertz MA, Verweij BH, Regli L, Rinkel GJ, Ruigrok YM, Doheny K, Liu Y, Broderick J, Foroud T. Lessons learned from whole exome sequencing in multiplex families affected by a complex genetic disorder, intracranial aneurysm. PLoS One. 2015; 10(3):e0121104.
  10. Moftakhar P, Cooke DL, Fullerton HJ, Ko NU, Amans MR, Narvid JA, Dowd CF, Higashida RT, Halbach VV, Hetts SW. Extent of collateralization predicting symptomatic cerebral vasospasm among pediatric patients: correlations among angiography, transcranial Doppler ultrasonography, and clinical findings. J Neurosurg Pediatr. 2015 Mar; 15(3):282-90.
  11. Choi JC, Oh YH, Kim JG, Kim HJ, Kong MH, Paeng DG, Ko NU, Easton JD. Spontaneous echo-contrast in the internal jugular veins of patients with ischemic stroke. J Clin Ultrasound. 2015 Sep; 43(7):431-7.
  12. Foroud T, Lai D, Koller D, Van't Hof F, Kurki MI, Anderson CS, Brown RD, Connolly ES, Eriksson JG, Flaherty M, Fornage M, von Und Zu Fraunberg M, Gaál EI, Laakso A, Hernesniemi J, Huston J, Jääskeläinen JE, Kiemeney LA, Kivisaari R, Kleindorfer D, Ko N, Lehto H, Mackey J, Meissner I, Moomaw CJ, Mosley TH, Moskala M, Niemelä M, Palotie A, Pera J, Rinkel G, Ripke S, Rouleau G, Ruigrok Y, Sauerbeck L, Slowik A, Vermeulen SH, Woo D, Worrall BB, Broderick J. Genome-wide association study of intracranial aneurysm identifies a new association on chromosome 7. Stroke. 2014 Nov; 45(11):3194-9.
  13. Rutledge WC, Ko NU, Lawton MT, Kim H. Hemorrhage rates and risk factors in the natural history course of brain arteriovenous malformations. Transl Stroke Res. 2014 Oct; 5(5):538-42.
  14. Smith A, Wu AH, Lynch KL, Ko N, Grenache DG. Multi-wavelength spectrophotometric analysis for detection of xanthochromia in cerebrospinal fluid and accuracy for the diagnosis of subarachnoid hemorrhage. Clin Chim Acta. 2013 Sep 23; 424:231-6.
  15. Moftakhar P, Hetts SW, Ko NU. Vascular myelopathies. Semin Neurol. 2012 Apr; 32(2):146-53.
  16. Foroud T, Koller DL, Lai D, Sauerbeck L, Anderson C, Ko N, Deka R, Mosley TH, Fornage M, Woo D, Moomaw CJ, Hornung R, Huston J, Meissner I, Bailey-Wilson JE, Langefeld C, Rouleau G, Connolly ES, Worrall BB, Kleindorfer D, Flaherty ML, Martini S, Mackey J, De Los Rios La Rosa F, Brown RD, Broderick JP. Genome-wide association study of intracranial aneurysms confirms role of Anril and SOX17 in disease risk. Stroke. 2012 Nov; 43(11):2846-52.
  17. Kishore S, Ko N, Soares BP, Higashida RT, Tong E, Bhogal S, Bredno J, Cheng SC, Wintermark M. Perfusion-CT assessment of blood-brain barrier permeability in patients with aneurysmal subarachnoid hemorrhage. J Neuroradiol. 2012 Dec; 39(5):317-25.
  18. Weinsheimer SM, Xu H, Achrol AS, Stamova B, McCulloch CE, Pawlikowska L, Tian Y, Ko NU, Lawton MT, Steinberg GK, Chang SD, Jickling G, Ander BP, Kim H, Sharp FR, Young WL. Gene expression profiling of blood in brain arteriovenous malformation patients. Transl Stroke Res. 2011 Dec 01; 2(4):575-87.
  19. Taub PR, Fields JD, Wu AH, Miss JC, Lawton MT, Smith WS, Young WL, Zaroff JG, Ko NU. Elevated BNP is associated with vasospasm-independent cerebral infarction following aneurysmal subarachnoid hemorrhage. Neurocrit Care. 2011 Aug; 15(1):13-8.
  20. Kamel H, Navi BB, Nakagawa K, Hemphill JC, Ko NU. Hypertonic saline versus mannitol for the treatment of elevated intracranial pressure: a meta-analysis of randomized clinical trials. Crit Care Med. 2011 Mar; 39(3):554-9.

Publications are derived from MEDLINE/PubMed and provided by UCSF Profiles, a service of the Clinical & Translational Science Institute (CTSI) at UCSF. Researchers can make corrections and additions to their publications by logging on to UCSF Profiles.