Jason L. Koh, M.D.

Jason L. Koh, M.D.

Jason L. Koh, M.D.

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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.


Commercial Plans
  • Aetna Choice POS (Open Access) and POS II (Open Access)
  • Aetna Elect Choice EPO and EPO Open Access
  • Aetna Health Network Options
  • Aetna HMO (including Open Access)
  • Aetna Managed Choice (Open Access)
  • Aetna Managed Choice POS
  • Aetna Open Access Aetna Select (Aetna HealthFund)
  • Aetna Open Access Elect Choice EPO (Aetna HealthFund)
  • Aetna Open Access Managed Choice POS (Aetna HealthFund)
  • Aetna Open Choice PPO
  • Aetna Open Choice PPO (Aetna HealthFund)
  • Aetna Premier Care Network
  • Aetna QPOS
  • Aetna Select
  • Aetna Select (Open Access)
  • Beechstreet PPO Network
  • Blue Cross Blue Shield - PPO Products
    Not Contracted Blue Cross Blue Shield Blue Choice PPO
  • Blue Cross Blue Shield Blue Advantage
    Verify PCP Participation
  • Blue Cross Blue Shield HMOI
  • Cigna HMO
  • Cigna LocalPlus
  • Cigna Open Access Plus (OAP)
  • Cigna Open Access Plus with CareLink (OAPC)
  • Cigna POS
  • Cigna PPO
  • Cofinity PPO (an Aetna Company)
  • Coventry Health Care Elect Choice EPO
  • Coventry Health Care First Health PPO
  • Galaxy Health PPO Network
  • Great West PPO/POS
  • Healthcare's Finest Network (HFN)
  • Humana - All Commercial Plans (including Choice Care)
  • Humana - NorthShore Complete Care
  • Humana/ChoiceCare Network PPO
  • Medicare
  • Multiplan and PHCS PPO Network (Including PHCS Savility)
  • Preferred Plan PPO
  • Three Rivers Provider PPO Network (TRPN)
  • Tricare
  • Unicare
  • United Healthcare - All Commercial Plans
    Not Contracted United Healthcare Core
    Not Contracted United Healthcare Navigate
Exchange Plans
  • Not Contracted Aetna
  • Blue Cross Blue Shield - PPO Products
    Not Contracted Blue Cross Blue Shield Blue Choice PPO
  • Blue Cross Blue Shield Blue Precision
    Verify PCP Participation
  • Not Contracted Coventry
  • Humana National
  • Land of Lincoln - All Products
  • Not Contracted United Healthcare Compass
  • Community Care Partners
  • Illinicare ICP
  • Illinois Department of Public Aid (IDPA)
Medicare Advantage Plans
  • Aetna Medicare (SM) Plan (HMO/Open Access HMO)
  • Aetna Medicare (SM) Plan (PPO)
  • Blue Cross Blue Shield Medicare Advantage PPO Plan
    Effective 1/1/2015
  • Cigna-HealthSpring Advantage HMO
  • Cigna-HealthSpring Premier HMO-POS
  • Cigna-HealthSpring Primary HMO
  • Humana Gold Plus HMO
  • Humana Gold Plus PFFS
  • HumanaChoice PPO
  • United Healthcare - All Medicare Plans
Medicare Medicaid Alignment Initiative (MMAI) Plans
  • Blue Cross Blue Shield Community
  • HealthSpring
  • Humana
  • Illinicare Health Plan
  • Meridian Complete


  • Number of Recent Inpatient Admissions as a Risk Factor for Increased Complications, length-of-stay, and Cost in Patients Undergoing Posterior Lumbar Fusion.

    Spine 2014 Sep 29

    Authors: Eleswarapu A,
    Study Design. Retrospective cohort studyObjective. To identify risk factors for increased complication rate, hospital charges, and length-of-stay in patients undergoing posterior lumbar fusion.Summary of Background Data. A better understanding of risk factors for perioperative complications in patients undergoing posterior lumbar fusion can aid with patient selection and postoperative monitoring. Previous studies have assessed the impact of factors such as body mass index, age, and ASA class on complication rate.Methods. Data was acquired from the institution's quality improvement dataset. Preoperative demographic factors included gender, age, number of inpatient admissions in the prior year, body mass index, Charlson comorbidity score, ASA class, number of levels fused, operative duration, and medications on admission. Complications recorded included pneumonia, myocardial infarction, venous thromboembolic event, hardware failure, readmission, or unplanned return to the OR. Multivariate regression was used to identify predictors of increased complication rate, hospital charges, and length-of-stay.Results. 462 patients were included. A history of more than one admission in the prior year was the only variable significantly associated with increased complication rate (odds ratio 10.56, p < .0001). History of more than one admission in the prior year (+1.92 days, p < .0001), operative duration >5 hours (+0.81 days, p = .008), and ASA class 3 or greater (+0.75 days, p = .01) were associated with increased length of stay, while history of more than one admission in the prior year (+$27,798, p < .0001), fusion of four or more levels (+$38,043, p < .0001), and operative duration >5 hours (+$40,298, p <.0001) were associated with increased total charges.Conclusions. The number of inpatient admissions in the prior year was found to be a more powerful predictor of perioperative risk following lumbar fusion than metrics evaluated in prior studies, such as age, BMI, and comorbidities.
    PMID: 25271515 [PubMed - as supplied by publisher]
  • Comparison of perioperative complications after total elbow arthroplasty in patients with and without diabetes.

    Journal of shoulder and elbow surgery / American Shoulder and Elbow Surgeons ... [et al.] 2014 Nov

    Authors: Toor AS,
    Few studies have analyzed the effect of diabetes on outcomes after total elbow arthroplasty (TEA). We investigated the perioperative complications after TEA in patients with and without diabetes.
    We evaluated the Nationwide Inpatient Sample (NIS) database from 2005 to 2010 for patients who underwent a TEA. Our retrospective study included 3184 patients based on International Classification of Diseases-Ninth Revision, Clinical Modification codes. We compared outcomes in 488 patients with diabetes and in 2696 patients without diabetes.
    Patients with diabetes had a significantly older mean age (66.8 vs 58.5 years, P < .001). There was no statistically significant difference when comparing length of stay (4.1 vs 3.7 days, P = .056) and cost of surgery ($56,582 vs $56,092, P = .833). A significantly higher percentage of diabetic patients underwent TEA for the indication of fracture (73.4% vs 65.3%), but a lower percentage for rheumatoid arthritis (10.2% vs 19.2%). They also had significantly increased rates of pneumonia (odds ratio [OR], 2.7), urinary tract infection (OR, 2.2), blood transfusion (OR, 2.1), and nonroutine discharge (OR, 1.9). After adjusting for significantly increased rates of comorbidities in diabetic patients, our multivariate analysis showed that having diabetes was independently associated with an increased risk of pneumonia (relative risk [RR], 2.6), urinary tract infection (RR, 1.9), and cerebrovascular accident (RR, 9.1). However, diabetes was not independently associated with hospital length of stay (P = .75), after correction, hospital cost (P = .63), or proportion of routine discharges (P = .12).
    Patients with diabetes have higher rates of comorbidities and perioperative complications after TEA.
    PMID: 25213826 [PubMed - as supplied by publisher]
  • Analysis of perioperative complications in patients after total shoulder arthroplasty and reverse total shoulder arthroplasty.

    Journal of shoulder and elbow surgery / American Shoulder and Elbow Surgeons ... [et al.] 2014 Aug 23

    Authors: Jiang JJ,
    Data directly comparing the perioperative complication rates between total shoulder arthroplasty (TSA) and reverse total shoulder arthroplasty (RTSA) are limited.
    The Nationwide Inpatient Sample database, which comprises data from a statistically representative sample of hospitals across the United States, was analyzed for the years 2010 and 2011. The International Classification of Diseases, Ninth Revision procedure codes differentiated the patients who received TSA (81.80) and RTSA (81.88). Demographic data, comorbidities, perioperative complications, and hospitalization data were compared.
    This retrospective analysis included 19,497 patients, with 14,031 patients in the TSA group and 5466 patients in the RTSA group. Patients who underwent RTSA were older (P < .001), were more likely to be female (P < .001), and had increased rates of fracture (P < .001). The RTSA group had significantly higher perioperative rates of mortality (P = .004), pneumonia (P < .001), deep venous thrombosis (P < .001), myocardial infarction (P = .005), urinary tract infection (P < .001), and blood transfusions (P < .001). In addition, the RTSA patients had longer hospital stays (P < .001) and higher hospital charges (P < .001). The rates of comorbidities were also higher in the patients who underwent RTSA. After adjustment for these differences in comorbidities and surgical indications with our multivariate analysis, RTSA was still independently associated with increased hospital charges (difference of $11,530; P < .001), longer hospitalization (difference of 0.24 day; P < .001), more blood transfusions (relative risk, 1.43; P < .001) and higher rates of pneumonia (relative risk, 1.61; P = .04) and deep venous thrombosis (relative risk, 2.24; P = .01).
    We found that RTSA patients, compared with TSA patients, had significantly longer length of stay, higher hospital charges that are not completely attributable to increased implant costs alone, and increased rates of perioperative complications.
    PMID: 25156959 [PubMed - as supplied by publisher]
  • 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]

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.

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