Jason L. Koh, M.D.

Jason L. Koh, M.D.

Jason L. Koh, M.D.

Log into NorthShoreConnect


Conditions & Procedures


Elbow Injury, Hip Injury, Knee Injury, Shoulder Injury, Sports Medicine


Cartilage Transplantation

General Information




NorthShore Medical Group


Shoulder & Knee Injuries, Hip Arthroscopy, Sports Medicine

Academic Rank

Clinical Associate Professor



Board Certified

Orthopaedic Surgery, Sports Medicine

Clinical Service

Sports Medicine

Education, Training & Fellowships

Medical School

Johns Hopkins University Schl of Med, 1994


Harvard Medical School - Massachusetts General Hospital, 1995


New York Presbyterian/Weill Cornell Med Ctr, 1999


Cleveland Clinic Foundation, 2000



NorthShore Medical Group

9650 Gross Point Rd.
Suite 2900
Skokie, IL 60076
847.866.7846 224.251.2905 fax This location is wheelchair accessible.

NorthShore Medical Group

2150 Pfingsten Rd.
Suite 3000
Glenview, IL 60026
847.866.7846 224.251.2905 fax This location is wheelchair accessible.


Every effort has been made to ensure the accuracy of the information in this directory. However, some changes may occur between updates. Please check with your provider to ensure that he or she participates in your health plan.

BCBS PPO *except Blue Choice IL
Beechstreet PPO
CIGNA Choice Fund
CIGNA Choice Fund PPO
CIGNA Network
CIGNA Network Open Access
CIGNA POS Open Access
CIGNA:Open Access Plus
First Health PPO
Galaxy PPO
Great West POS
Great West PPO
Healthcares Finest Network PPO
Humana Choice Care PPO
Humana IPA--HMO
Humana POS
Humana PPO
Land of Lincoln
Multiplan Admar PPO
Multiplan Formost PPO
Multiplan Health Network PPO
Multiplan Wellmark PPO
NorthShore Employee Network I (EPO Option)
NorthShore Employee Network II (EPO Plus & CDHP)
Preferred Plan PPO
Railroad Medicare - Cook County
Railroad Medicare - Lake County
UHC *except Core & Navigate
Unicare PPO


  • Patellar instability.

    Clinics in sports medicine 2014 Jul

    Authors: Koh JL,
    Patella instability can cause significant pain and functional limitations. Several factors can predispose to patella instability, such as ligamentous laxity, increased anterior TT-TG distance, patella alta, and trochlear dysplasia. Acquired factors include MPFL injury or abnormal quadriceps function. In many cases, first-time dislocation can successfully be managed with physical therapy and other nonoperative management; however, more than one dislocation significantly increases the chance of recurrence. Surgical management can improve stability, but should be tailored to the injuries and anatomic risk factors for recurrent dislocation. Isolated lateral release is not supported by current literature and increases the risk of iatrogenic medial instability. Medial repair is usually reserved for patients with largely normal anatomy. MPFL reconstruction can successfully stabilize patients with medial soft tissue injury but is a technically demanding procedure with a high complication rate and risks of pain and arthrosis. Tibial tubercle osteotomy can address bony malalignment and also unload certain articular cartilage lesions while improving stability. Trochleoplasty may be indicated in individuals with a severely dysplastic trochlea that cannot otherwise be stabilized. A combination of procedures may be necessary to fully address the multiple factors involved in causing pain, loss of function, and risk of recurrence in patients with patellar instability.
    PMID: 24993410 [PubMed - as supplied by publisher]
  • Neer Award 2012: cerebral oxygenation in the beach chair position: a prospective study on the effect of general anesthesia compared with regional anesthesia and sedation.

    Journal of shoulder and elbow surgery / American Shoulder and Elbow Surgeons ... [et al.] 2013 Oct

    Authors: Koh JL,
    Devastating neurologic ischemic episodes, such as stroke and deafness, have occurred in patients undergoing shoulder surgery in the beach chair position. We hypothesized that awake patients would be able to avoid significant cerebral deoxygenation events (CDEs) compared with anesthetized patients when procedures were performed in the beach chair position.
    Sixty patients underwent elective shoulder surgery in the beach chair position. Thirty patients underwent an interscalene block and monitored sedation (awake group); 30 patients underwent general anesthesia (asleep group). Cerebral oxygenation saturation (Scto2) was measured during the procedure. Scto2 values below critical thresholds were defined as CDEs and treated.
    Baseline mean arterial pressure and Scto2 values were lower in the asleep group during the operation (P < .0001). A higher incidence of CDEs was seen in the asleep group (56.7% vs 0% awake group), and more CDEs were seen per patient (2.97 in asleep vs 0 awake, P < .0001). Scto2 below a threshold value of 55% was seen in 23.3% in the asleep group vs 3.3% in the awake group. A total of 89 combined desaturation events were documented in the asleep vs 1 in the awake group (P < .0001).
    Patients in the beach chair position treated with regional anesthesia and sedation had almost no cerebral desaturation events, unlike patients who had general anesthesia. Avoidance of general anesthesia in the beach chair position may reduce the risk of ischemic neurologic injury.
    PMID: 23571083 [PubMed - as supplied by publisher]
  • Arthroscopic treatment of hip pain.

    Disease-a-month : DM 2012 Sep

    Authors: Meininger AK,
    Leg pain in runners is a common complaint in any sports medicine practice. Although the possible diagnoses are many, the evaluation depends on a thorough history. A comprehensive physical examination should include not only examination of the injury but the kinetic chain and core. It is imperative to recognize functional deficiencies in core strength and balance to prevent further injury. The successful integration of history, physical examination, and functional testing will enhance your evaluation of the injured runner and help return athletes to sport.
    PMID: 22898379 [PubMed - as supplied by publisher]
  • Low-pressure foaming: a novel method for the fabrication of porous scaffolds for tissue engineering.

    Tissue engineering. Part C, Methods 2012 Feb

    Authors: Chung EJ,
    Scaffolds for tissue engineering applications must incorporate porosity for optimal cell seeding, tissue ingrowth, and vascularization, but common fabrication methods for achieving porosity are incompatible with a variety of polymers, limiting widespread use. In this study, porous scaffolds consisting of poly(1,8-octanediol-co-citrate) (POC) containing hydroxyapatite nanocrystals (HA) were fabricated using low-pressure foaming (LPF). LPF is a novel method of fabricating an interconnected, porous scaffold with relative ease. LPF takes advantage of air bubbles that act as pore nucleation sites during a polymer mixing step. Vacuum is applied to expand the nucleation sites into interconnected pores that are stabilized through cross-linking. POC was combined with 20%, 40%, and 60% by weight HA, and the effect of increasing HA particle content on porosity, mechanical properties, and alkaline phosphatase (ALP) activity of human mesenchymal stem cells (hMSC) was evaluated. The effect of the prepolymer viscosity on porosity and the mechanical properties of POC with 40% by weight HA (POC-40HA) were also assessed. POC-40HA scaffolds were also implanted in an osteochondral defect of a rabbit model, and the explants were assessed at 6 weeks using histology. With increasing HA content, the pore size of POC-HA scaffolds can be varied (85 to 1,003 μm) and controlled to mimic the pore size of native trabecular bone. The compression modulus increased with greater HA content under dry conditions and were retained to a greater extent than with porous scaffolds fabricated using salt-leaching under wet conditions. Furthermore, all POC-HA scaffolds prepared using LPF supported hMSC attachment, and an increase in ALP activity correlated with an increase in HA content. An increase in the prepolymer viscosity resulted in increased compression modulus, greater distance between pores, and less porosity. After 6 weeks in vivo, cell and tissue infiltration was present throughout the scaffold. This study describes a novel method of creating porous osteoconductive POC scaffolds without the need for porogen leaching and provides the groundwork for applying LPF to other elastomers and composites.
    PMID: 21933018 [PubMed - as supplied by publisher]
  • A biomechanical comparison of patellar tendon repair materials in a bovine model.

    Orthopedics 2011 Aug

    Authors: Flanigan DC,
    We evaluated the biomechanical properties of FiberWire (Arthrex, Inc, Naples, Florida), a new suture material, for both repair and augmentation as compared to standard Ethibond suture (Ethicon, Inc, Somerville, New Jersey), hypothesizing that primary repair and cerclage augmentation with the new suture material would have similar biomechanical properties as a standard repair with wire augmentation. Forty-five fresh bovine knees were placed in 3 groups of equal size: (1) #5 Ethibond tendon repair plus 18-gauge wire augmentation; (2) #5 FiberWire repair plus #5 FiberWire augmentation; and (3) #5 Ethibond repair plus #5 FiberWire augmentation. A straight static pullout test was performed, randomly alternating between the different groups. Gap formation was measured at the center of the repair by a metric ruler, with the examiner blinded to the developing force-tension readout. For each millimeter of gap formation (1-10 mm), the force on the repair was recorded, as well as the force at the ultimate failure of the repair, designated by breakage of any repair material. Analysis showed no significant difference between the standard Ethibond/wire repair and the FiberWire/FiberWire repair. The Ethibond/FiberWire repair was shown to be significantly weaker than the other 2 groups. Ultimate failure data indicated that the Ethibond/wire repair was significantly stronger than both other groups. No significant differences were found between the FiberWire/FiberWire repair and the Ethibond/FiberWire repair. Newer, stronger suture material for both primary repair and augmentation may provide equivalent biomechanical strength at clinically significant levels.
    PMID: 21815574 [PubMed - as supplied by publisher]
  • Long-term in vivo response to citric acid-based nanocomposites for orthopaedic tissue engineering.

    Journal of materials science. Materials in medicine 2011 Sep

    Authors: Chung EJ,
    The disadvantages of current bone grafts have triggered the development of a variety of natural and synthetic bone substitutes. Previously, we have described the fabrication, characterization, and short-term tissue response of poly(1,8-octanediol-co-citrate) (POC) with 60 weight % hydroxyapatite nanocrystals (POC-HA) at 6 weeks. In order to better understand the clinical potential, longer term effects, and the biodegradation, biocompatibility, and bone regenerative properties of these novel nanocomposites, POC-HA, POC, and poly-L-lactide (PLL) were implanted in osteochondral defects in a rabbit model and assessed at 26 weeks. Explants were stained with Masson Goldner Trichrome and the fibrous capsule and tissue ingrowth measured. In addition, the bone-implant and bone-cartilage response of POC-HA, POC, and PLL were assessed through histomorphometry and histological scoring. Upon histological evaluation, both POC-HA and POC implants were biocompatible, but PLL implants were surrounded by a layer of leukocytes at 26 weeks. In addition, due to the degradation properties of POC-HA, tissue grew into the implant and had the highest area of tissue ingrowth although not statistically significant. Histomorphometric analyses supported a similar osteoid, osteoblast, and trabecular bone surface area among all implants although the fibrous capsule thickness was the largest for POC. Moreover, histological scoring demonstrated comparable scores among all three groups of the articular cartilage and subchondral bone. This study provides the long-term bone and cartilage response of novel, citric acid-based nanocomposites and their equivalence to FDA-approved biomaterials. Furthermore, we provide new insights and further discussion of these nanocomposites for orthopaedic applications.
    PMID: 21786133 [PubMed - as supplied by publisher]
  • Developing a 6-DOF robot to investigate multi-axis ACL injuries under valgus loading coupled with tibia internal rotation.

    Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference 2010

    Authors: Ren Y, Jacobs BJ, Nuber GW, Koh JL, Zhang LQ,
    Anterior cruciate ligament (ACL) injuries have become more common in recent years as more young people participate in risky sporting activities [1]. Most ACL injuries occur as a result of noncontact mechanisms. Previous in vitro studies of ACL strain have found significant increases in ACL strain primarily with anterior directed force on the tibia relative to the femur and with internal rotation and often with valgus torque [2,3]. However, there remains significant controversy over the mechanisms of ACL failure and the forces on the knee that lead to injury. Some studies have also shown that isolated valgus loading may not load the ACL strongly. The goal of this study was to investigate the mechanism underlying valgus-related ACL injuries. An improved understanding of ACL failure may lead to improved ACL injury prevention programs. A novel 6 degrees of freedom (DOF) knee driving robot was developed in this study with a unique multi-axis simultaneous torque/position control. It was found that pure valgus torque caused a torque that internally rotated the tibia and thus increased ACL strain markedly, which may be an important mechanism underlying the rather common seemingly valgus-related ACL injuries.
    PMID: 21097089 [PubMed - as supplied by publisher]
  • Early tissue response to citric acid-based micro- and nanocomposites.

    Journal of biomedical materials research. Part A 2011 Jan

    Authors: Chung EJ,
    Composites based on calcium phosphates and biodegradable polymers are desirable for orthopedic applications because of their potential to mimic bone. Herein, we describe the fabrication, characterization, and in vivo response of novel citric acid-based microcomposites and nanocomposites. Poly(1,8-octanediol-co-citrate) (POC) was mixed with increasing amounts of hydroxyapatite (HA) nanoparticles or microparticles (up to 60 wt %), and the morphology and mechanical properties of the resulting composites were assessed. To investigate tissue response, nanocomposites, microcomposites, POC, and poly(L-lactide) were implanted in osteochondral defects in rabbits and harvested at 6 weeks for histological evaluation. Scanning electron microscopy confirmed increased surface roughness of microcomposites relative to nanocomposites. The mechanical properties of both types of composites increased with increasing amounts of HA (8-328 MPa), although nanocomposites with 60 wt % HA displayed the highest strength and stiffness. Based on tissue-implant interfacial assessments, all implants integrated well with the surrounding bone and cartilage with no evidence of inflammation. Both nanocomposites and microcomposites supported bone remodeling; however, nanocomposites induced more trabecular bone formation at the tissue-implant interface. The mechanical properties of citric acid-based composites are within the range of human trabecular bone (1-1524 MPa, 211 ± 78 MPa mean modulus), and tissue response was dependent on the size and content of HA, providing new perspectives of design and fabrication criteria for orthopedic devices such as interference screws and fixation pins.
    PMID: 20949482 [PubMed - as supplied by publisher]

In the News

Jun 2014

May 2014

Dec 2013

Oct 2013

Jul 2013

Nov 2012

Featured Videos

Dr. Jason Koh,  Chairman of the Department of Orthopaedic Surgery and Director of the NorthShore Orthopaedic Institute, speaks about the collaborative care offered by the Department of Orthopaedic Surgery.

Dr. Jason Koh, Chairman of the Department of Orthopaedic Surgery and Director of the NorthShore Orthopaedic Institute, speaks about the collaborative care offered by the Department of Orthopaedic Surgery.

× Alternate Text