Jason Ko, MD

Assistant ProfessorJason Ko, MD

 Hand and Wrist/Brachial Plexus and Peripheral Nerve/Microvascular Surgery

College: Duke University

Medical School: Duke University School of Medicine

Internship: Northwestern University—Integrated Plastic & Reconstructive Surgery

Residency: Northwestern University—Integrated Plastic & Reconstructive Surgery

Fellowship: University of Washington–Hand and Microvascular Surgery, 2011-2012 ; Rehabilitation Institute of Chicago (Research Fellowship, 2009-2011); Northwestern University—Research Fellowship, 2007-2008

Board Certification:  Board Eligible, American Board of Plastic Surgery

About Dr. Ko

Dr. Ko is an Assistant Professor in the Department of Orthopaedics and Sports Medicine and the Division of Plastic Surgery at the University of Washington.  He practices at Harborview Medical Center and at Northwest Hospital and Medical Center. 

Dr. Ko received his undergraduate degree at Duke University in Durham, NC, after which he was awarded a Fulbright Scholarship to teach English in South Korea.  Following his year in Korea, Dr. Ko obtained his medical degree at Duke University School of Medicine.  He then completed his training in plastic and reconstructive surgery in the integrated residency program at Northwestern University in Chicago, IL, during which he was awarded the 2008 Plastic Surgery Foundation (PSF) Research Fellowship for his research on Targeted Reinnervation—a surgery that involves nerve transfers in upper extremity amputees that allows them to control a bionic arm—and its effects on neuroma formation.  After his residency, Dr. Ko came to the University of Washington for a fellowship in Hand and Microvascular Surgery.  He then spent some time at Chang Gung Memorial Hospital in Taiwan and the University of Tokyo in Japan to focus on microsurgery/supermicrosurgery, brachial plexus reconstruction, and peripheral nerve surgery, before joining the faculty at the University of Washington.

Patient Care Philosophy

Always do what is best for the patient, first and foremost.

Personal Interests

He enjoys traveling, good food, and spending time with his family and friends.  Having moved from Chicago to Seattle, he and his wife hope to become more avid hikers and skiiers.

Clinical Interests

Hand, wrist, and upper extremity surgery; brachial plexus and peripheral nerve surgery; Targeted Reinnervation surgery for upper and lower extremity amputees; lower extremity reconstruction and limb salvage; microsurgery; minimally invasive surgery; abdominal wall reconstruction; complex reconstructive surgery; vascularized composite allotransplantation (VCA).


Hand and Wrist Surgery, Neuropathy/Nerve Injury, Reconstructive Plastic Surgery


American Society for Surgery of the Hand (ASSH)
American Association for Hand Surgery (AAHS)
American Society of Reconstructive Microsugery (ASRM)
American Society for Reconstructive Transplantation (ASRT)
American Society of Plastic Surgeons (ASPS)—ASPS/Plastic Surgery Foundation (PSF) Young Plastic Surgeons (YPS) Steering Committee
Plastic Surgery Research Council (PSRC)

Surgeries & Diagnosis

Dr. Ko treats the following conditions, in addition to other disorders of the hand and wrist that are not listed below:


Carpal tunnel release (open or endoscopic)
Cubital tunnel release (open or endoscopic)
Thumb joint replacement for arthritis
Surgical fixation for fractures of the hand and wrist
Repair of nerve, tendon, and blood vessel injuries in the hand and wrist
Post-traumatic reconstruction surgery for the hand and wrist
Brachial plexus reconstruction
Peripheral nerve surgery
Neuroma surgery
Targeted Muscle Reinnervation (nerve transfer surgery in amputees)
Microsurgery for upper and lower extremity reconstruction
Surgery for vascular diseases of the hand (sympathectomy, Botox)
Dupuytren's open contracture release
Needle aponeurotomy for Dupuytren's
Xiaflex (collagenase) for Dupuytren's 


Carpal tunnel syndrome (median nerve)
Cubital tunnel syndrome (ulnar nerve)
Peripheral nerve injury to the upper extremity
Trigger finger
Dupuytren's contracture
Fractures and dislocations of the hand and wrist
Arthritis involving the hand and wrist
Thumb arthritis
Sprains, strains, or ligament tear in the hand and wrist
Contractures and stiffness in the fingers
Amputee care
Brachial plexus injury
Vascular diseases of the hand (Raynaud’s) 


Selected Publications

Ledbetter NM, Ethier C, Oby ER, Hiatt SD, Wilder AM, Ko JH, Agnew SP, Miller LE, Clark GA. Intrafascicular stimulation of monkey arm nerves evokes coordinated grasp and sensory responses. J Neurophysiol 2013; 109(2): 580-90.

Tse R and Ko JH. Nerve glue for upper extremity reconstruction. Hand Clinics 2012; 28(4): 529-40.

Ko JH and Wiedrich TA. Triangular fibrocartilage complex injuries in the elite athlete. Hand Clinics 2012; 28(3): 307-21.

Ko JH and Hanel DP. Technique of fasciotomy: Hand. Techniques in Orthopaedics 2012; 27(1): 38-42.

Kim PS, Ko JH, O’Shaughnessy KD, Kuiken TA, Dumanian GA. The effects of targeted muscle reinnervation on neuromas in a novel rabbit rectus abdominis flap model. J Hand Surg 2012; 37(8): 1609-16.

Ko JH, Kalainov DM, Hsu L, Fang RC, Mastey RD. Dual lateral band transfer for treatment of traumatic hyperextension instability of the proximal interphalangeal joint: A report of two cases. Hand 2012; 7(1): 108-13.

Ko JH, Kim PS, Zhao Y, Hong SJ, Mustoe TA. HMG-CoA reductase inhibitors (Statins) reduce hypertrophic scar formation in a rabbit ear wounding model. Plast Reconstr Surg 2012; 129(12): 252e-261e.

Agnew SP, Ko J, De la Garza M, Kuiken T, Dumanian G. Limb transplantation and targeted reinnervation: A practical comparison. J Reconstr Microsurg 2012; 28(1): 63-8.

Ko JH, Kim PS, O’Shaughnessy KD, Kuiken TA, Dumanian GA. A quantitative evaluation of gross versus histologic neuroma formation in a rabbit forelimb amputation model: Potential implications for the operative treatment and study of neuromas. J Brachial Plex Peripher Nerve Inj 2011; 6: 8-17.

Kim PS, Ko J, O’Shaughnessy KK, Kuiken TA, Dumanian GA. Novel model for end neuroma formation in the amputated rabbit forelimb. J Brachial Plex Peripher Nerve Inj 2010; 5: 6-13.

Ko JH, Wang EC, Salvay DM, Paul BC, Dumanian GA. Abdominal wall reconstruction: Lessons learned from 200 “Components Separation” procedures. Arch Surg 2009; 144(11): 1047-55.

Dumanian GA, Ko JH, O’Shaughnessy KD, Kim PS, Wilson CJ, Kuiken TA. Targeted reinnervation for transhumeral amputees: current surgical technique and update on results. Plast Reconstr Surg 2009; 124(3): 863-9.

Ko JH, Salvay DM, Paul BC, Wang EC, Dumanian GA. Soft polypropylene mesh, but not cadaveric dermis, significantly improves outcomes in midline hernia repairs using the components separation technique. Plast Reconstr Surg 2009; 124(3): 836-47.

Ko J, Ross J, Awad H, Hurwitz H, Klitzman B. The effects of ZD6474, an inhibitor of VEGF signaling, on cutaneous wound healing in mice. J Surg Res 2005; 129(2): 251-9.


Selected Book Chapters

Ko JH and Hanel DP. Lateral arm flap. In Boyd JB and Jones NF (ed.), Operative Microsurgery, 1st Ed., McGraw-Hill, in press.

Ko JH, Kim PS, Smith DG. Targeted muscle reinnervation as a strategy for end-neuroma prevention. In Shultz AE and Kuiken TA (ed.), Targeted Muscle Reinnervation (TMR) Monograph, 1st Ed., Elsevier, in press.

Oby ER, Ethier C, Bauman MJ, Perreault EJ, Ko JH, Miller LE. Prediction of muscle activity from cortical signals to restore hand grasp in subjects with spinal cord injury. In Oweiss KG (ed.), Statistical Signal Processing for Neuroscience and Neurotechnology, 1st Ed., Academic Press, Elsevier, 2010.

Ko JH and Few J. Alloplastic materials. In Kryger ZB and Sisco M (ed.), Practical Plastic Surgery, 1st Ed., Landes Bioscience, 2007.


Dr. Ko is conducting research on Targeted Reinnervation and its effects on neuroma formation.  He also collaborates with colleagues in the Departments of Bioengineering and Neurological Surgery to use biologic scaffolds and stem cells to improve peripheral nerve repair and regeneration.  In addition, Dr. Ko is working with Drs. Mathes and Neligan to start a vascularized composite allotransplantation (VCA) program at the University of Washington that will make face, hand, and arm transplantation a clinical reality for patients in the Pacific Northwest.  Dr. Ko recently received a grant from the Musculoskeletal Transplant Foundation (MTF) for his research on VCA.


Hand Clinic at Harborview

Ninth & Jefferson Building
6th Floor, Ninth & Jefferson Building
908 Jefferson St.
Seattle, WA 98104
(206) 520-5000 

Burn and Plastic Surgery Clinic at Harborview

Harborview Medical Center
8th Floor, East Hospital
Box 359835
325 Ninth Ave.
Seattle, WA 98104
(206) 520-5000

Hand Clinic at Northwest Hospital & Medical Center

10330 Meridian Ave N Suite 270, Seattle, WA 98133
(206) 520-5000