Dr. James Lewis, MD

• Gastroenterology

*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.

• Yale New Haven Hospital

  Residency Hospital

• Yale New Haven Hospital

  Internship Hospital

• University Of Pennsylvania Perelman School Of Medicine

  Medical School

• External Validation of the VOCAL-Penn Cirrhosis Surgical Risk Score in Two Large, Independent Health Systems, 2021-06-23

• Risks of Development of COVID-19 Among Patients With Inflammatory Bowel Disease: A Comparative Assessment of Risk Factors for Incident Infection, 2022-03-29

• Long-Term Outcomes Following Multiply Recurrent Clostridioides Difficile Infection and Fecal Microbiota Transplantation, 2020-12-08

• Role of Dietary Fiber in the Recovery of the Human Gut Microbiome and its Metabolome, 2021-01-12

• Association between itraconazole, a hedgehog-inhibitor, and bladder cancer, 2016-01-23

• Evaluation of the Patient Reported Outcomes Measurement Information System in a large cohort of patients with Inflammatory Bowel Diseases, 2013-10-29

• Archaea and Fungi of the Human Gut Microbiome: Correlations with Diet and Bacterial Residents, 2013-06-17

• Association Between Anti-TNF-a Therapy and All-Cause Mortality, 2012-10-15

• Association between symptomatic versus asymptomatic recurrence and survival in bladder cancer, 2017-12-06

• Association between Vaccination for Herpes Zoster and Risk of Herpes Zoster Infection among Older Patients with Selected Immune-mediated Diseases, 2012-07-04

• The Benefit to Risk Balance of Combining Infliximab with Azathioprine Varies With Age: A Markov Model, 2014-08-10

• Delays Related to Prior Authorization in Inflammatory Bowel Disease, 2022-03-01

• Use of Abdominopelvic Computed Tomography in Emergency Departments and Rates of Urgent Diagnoses in Crohn's Disease, 2011-09-22

• Large-scale sequencing identifies multiple genes and rare variants associated with Crohn's disease susceptibility, 2022-08-29

• Tumor Necrosis Factor Alpha Inhibitor Therapy and Cancer Risk In Chronic Immune Mediated Diseases, 2013-07-25

• Inflammatory Bowel Diseases Are Associated With an Increased Risk for Chronic Kidney Disease, Which Decreases With Age, 2019-11-01

• Mesalamine Dose Escalation Reduces Fecal Calprotectin In Patients With Quiescent Ulcerative Colitis, 2014-04-30

• Risk Prediction Models for Post-Operative Decompensation and Infection in Patients with Cirrhosis: A Veterans Affairs Cohort Study, 2021-07-08

• Endoscopy Is Not Associated with Infectious Adverse Events After Hematopoietic Cell Transplantation: A Retrospective Cohort Study, 2021-05-29

• Risk for Post-Colonoscopy Irritable Bowel Syndrome in Patients with and without Antibiotic Exposure: A Retrospective Cohort Study, 2021-09-03

• Hospital Performance for Gastrointestinal Bleeding Mortality, Length of Stay, and Complication Rates in the USA, 2022-01-15

• Contribution of higher risk genes and European admixture to Crohn's disease in African Americans, 2012-03-12

• Impact of JC Virus Antibody Testing in Patients With Crohn's Disease With Loss of Response to Infliximab: A Markov Model, 2014-07-11

• Risk of non-melanoma skin cancer in patients with a history of NMSC with the use of immunosuppressant and biologic agents in autoimmune disease, 2018-04-13

• The Utility of Biomarkers in the Diagnosis and Therapy of Inflammatory Bowel Disease, 2013-07-23

• Dietary Patterns and Self-Reported Associations of Diet with Symptoms of Inflammatory Bowel Disease, 2012-08-26

• Passive Smoking and Inflammatory Bowel Disease: A Meta-analysis, 2009-06-12

• Oral Azole Antifungal Medications and Risk of Acute Liver Injury, Overall and by Chronic Liver Disease Status, 2015-11-17

• ACA-Mandated Elimination of Cost Sharing for Preventive Screening Has Had Limited Early Impact, 2018-09-21

• Diet standardization reduces intra-individual microbiome variation GUT MICROBES, 2022-11-25

• Effectiveness and Safety of Immunomodulators with Anti-TNF Therapy in Crohn's Disease, 2015-02-24

• The proportion of Model for End-stage Liver Disease Sodium score attributable to creatinine independently predicts post-transplant survival and renal complications, 2020-02-20

• Increased Distance to a Liver Transplant Center is Associated with Higher Mortality for Patients with Chronic Liver Failure, 2017-02-27

• Disentangling the Association between Statins, Cholesterol, and Colorectal Cancer: A Nested Case-Control Study, 2016-04-26

• Investigator initiated IBD trials in the US: Facts, obstacles and answers, 2016-08-05

• Cancer Recurrence Following Immune-suppressive Therapies in Patients With Immune-mediated Diseases: a Systematic Review and Meta-analysis, 2016-04-01

• Incidence, Risk Factors, and Clinical Effects of Recurrent Diverticular Hemorrhage: A Large Cohort Study, 2018-07-26

• Validating a novel algorithm to identify patients with autoimmune hepatitis in an administrative database, 2021-05-21

• The use of induction therapy in liver transplantation is highly variable and is associated with post-transplant outcomes, 2019-07-17

• Modeling Optimal Clinical Thresholds for Elective Abdominal Hernia Repair in Patients With Cirrhosis Optimal Clinical Thresholds for Elective Abdominal Hernia Repair in Patients With Cirrhosis, 2022-09-13

• Risk of Hospitalized Infection in Rheumatoid Arthritis Patients Receiving Biologics Following a Previous Infection While on Treatment with Anti-TNF Therapy, 2014-03-07

• Challenges in IBD Research: Update on Progress and Prioritization of the CCFA's Research Agenda, 2013-07-24

• Association Between Statin Use at the Time of Intra-abdominal Surgery and Postoperative Adhesion-Related Complications and Small-Bowel Obstruction Statin Use at Intra-abdominal Surgery and Postoperative Adhesion-Related Complications and Small-Bowel Obstruction, 2021-02-03

• Initiation of tumor necrosis factor-a antagonists and the risk of hospitalization for infection in patients with autoimmune diseases, 2011-11-06

• Hepatocellular Carcinoma Surveillance Rates in Commercially Insured Patients with Non-Cirrhotic Chronic Hepatitis B, 2015-01-12

• Secular Trends in Small Bowel Obstruction and Adhesiolysis in the United States, 1988-2007, 2012-05-09

• Diet Recommendations for Hospitalized Patients With Inflammatory Bowel Disease: Better Options Than Nil Per Os, 2020-07-17

• Crohn's Disease and Ulcerative Colitis Are Associated With Elevated Standardized Mortality Ratios: A Meta-Analysis, 2013-07-18

• Exception Points and Body Size Contribute to Gender Disparity in Liver Transplantation, 2017-03-10

• Inflammation, Antibiotics, and Diet as Environmental Stressors of the Gut Microbiome in Pediatric Crohn's Disease, 2015-10-14

• Indeterminate QuantiFERON-TB Gold Increases Likelihood of Inflammatory Bowel Disease Treatment Delay and Hospitalization, 2017-12-19

• Sustained Post-Transplant Diabetes is Associated with Long-Term Major Cardiovascular Events Following Liver Transplantation, 2017-07-27

• Population-representative Incidence of Drug-induced Acute Liver Failure Based on an Analysis of an Integrated Healthcare System, 2015-02-28

• Validation of a coding algorithm to identify bladder cancer and distinguish stage in an electronic medical records database, 2014-11-11

• Microscopic colitis and Medication Use, 2010-05-18

• Increasing Complexity of Clinical Research in Gastroenterology: Implications for Training Clinician-Scientists, 2014-07-11

• Multi-omic analysis of the interaction betweenClostridioides difficileinfection and pediatric inflammatory bowel disease, 2020-08-20

• Use of Abdominopelvic Computed Tomography in Emergency Departments and Rates of Urgent Diagnoses in Crohn's Disease, 2013-07-25

• Radiofrequency Ablation is Associated with Decreased Neoplastic Progression in Patients with Barrett's Esophagus and Confirmed Low-Grade Dysplasia, 2015-04-24

• Comparative metabolomics in vegans and omnivores reveal constraints on diet-dependent gut microbiota metabolite production, 2014-11-26

• Validity of Diagnostic Codes and Laboratory Tests of Liver Dysfunction to Identify Acute Liver Failure Events, 2015-04-10

• Association Between Anti-TNF-a Therapy and Interstitial Lung Disease, 2013-01-29

• Temporal and Within Practice Variability in The Health Improvement Network, 2011-07-13

• Psychometric evaluation of the Urgency NRS as a new patient-reported outcome measure for patients with ulcerative colitis, 2022-11-05

• The Risk of Hypersensitivity Associated with Biologic Use among Medicare Patients with Rheumatoid Arthritis, 2017-03-16

• Measurement of Inflammatory Bowel Disease Symptoms: Reliability of an Abbreviated Approach to Data Collection, 2015-05-12

• Serum glucose and hemoglobin A1C levels at cancer diagnosis and disease outcome, 2016-03-25

• Comparative Effectiveness of Infliximab and Adalimumab for Crohn's Disease, 2013-06-28

• Patient Preferences for Surgical Versus Medical Therapy for Ulcerative Colitis, 2014-07-11

• Increasing Use of Prescription Drugs in the United Kingdom, 2015-12-29

• Fungi of the Murine Gut: Episodic Variation and Proliferation during Antibiotic Treatment, 2013-08-19

• A Randomized Trial Comparing the Specific Carbohydrate Diet to a Mediterranean Diet in Adults with Crohn's Disease, 2021-05-27

• Randomized Controlled-Feeding Study of Dietary Emulsifier Carboxymethylcellulose Reveals Detrimental Impacts on the Gut Microbiota and Metabolome, 2021-11-11

• Reducing Hospital Admissions for Paracentesis: A Quality Improvement Intervention, 2019-09-10

• Understanding Characteristics of Who Undergoes Testing is Crucial for the Development of Diagnostic Strategies to Identify Individuals at Risk for Early-age Onset Colorectal Cancer, 2021-01-12

• Methotrexate is not superior to placebo in maintaining steroid-free response or remission in ulcerative colitis, 2018-06-30

• Validation of a coding algorithm to identify patients with hepatocellular carcinoma in an administrative database, 2012-11-04

• Efficacy of the Autoimmune Protocol Diet for Inflammatory Bowel Disease, 2017-07-12

• A role for bacterial urease in gut dysbiosis and Crohn's disease, 2017-11-15

• Mortality Associated with Medical Therapy Versus Elective Colectomy in Ulcerative Colitis, 2015-08-18

• Distinguishing incident and prevalent diabetes in an electronic medical records database, 2013-12-19

• An Optimized Patient-reported Ulcerative Colitis Disease Activity Measure Derived from the Mayo Score and the Simple Clinical Colitis Activity Index, 2014-07-11

• Risk of Acute Liver Failure in Patients with Drug-Induced Liver Injury: Evaluation of Hy's Law and a New Prognostic Model, 2015-06-27

• Enterotypes in the landscape of gut microbial community composition, 2017-12-18

• Fecal Microbiota Transplantation Is Highly Effective in Real-World Practice: Initial Results From the FMT National Registry, 2020-10-01

• Use of the Non-invasive Components of the Mayo Score to Assess Clinical Response in Ulcerative Colitis, 2008-09-03

• Study Design for a Comprehensive Assessment of Biologic Safety Using Multiple Healthcare Data Systems, 2011-09-15

• Validation of The Health Improvement Network (THIN) Database for Epidemiologic Studies of Chronic Kidney Disease, 2011-08-24

• Rates of Hospitalized Bacterial Infection Associated with Juvenile Idiopathic Arthritis and Its Treatment, 2012-03-14

• Linking Long-Term Dietary Patterns with Gut Microbial Enterotypes, 2011-09-01

• Non-viral Opportunistic Infections in New Users of TNF Inhibitor Therapy: Results of the SAfety Assessment of Biologic ThERapy (SABER) Study, 2013-07-13

• No Increased Risk of Myocardial Infarction Among Patients with Ulcerative Colitis or Crohn's Disease, 2011-07-13

• Serial Glycosylated Hemoglobin Levels and Risk of Colorectal Neoplasia among Patients with Type 2 Diabetes Mellitus, 2010-10-11

• Thiazolidinedione Therapy Is Not Associated with Increased Colonic Neoplasia Risk in Patients with Diabetes Mellitus, 2008-09-13

• Intestinal microbiota metabolism ofL-carnitine, a nutrient in red meat, promotes atherosclerosis, 2013-04-07

• NOD2mutations and anti-Saccharomyces cerevisiaeantibodies are risk factors for Crohn's disease in African Americans, 2009-10-13

• Association between the initiation of anti-TNF therapy and the risk of herpes zoster, 2013-03-06

• Sampling and pyrosequencing methods for characterizing bacterial communities in the human gut using 16S sequence tags, 2010-07-30

• Patients with Hepatocellular Carcinoma Have Highest Rates of Wait-listing for Liver Transplantation Among Patients With End-stage Liver Disease, 2016-06-29

• Conservation of Gene Cassettes among Diverse Viruses of the Human Gut, 2012-08-10

• Food and the Gut Microbiota in IBD: A Critical Connection, 2013-08-30

• The Importance and Challenges of Dietary Intervention Trials for Inflammatory Bowel Disease, 2016-12-14

• Identifying Newly Approved Medications in Medicare Claims Data: A Case Study Using Tocilizumab, 2013-09-09

• Risk of Myocardial Infarction Associated with Chronic Hepatitis C Virus Infection: A Population-Based Cohort Study, 2011-11-13

• Association of Anti-Tumor Necrosis Factor Therapy With Mortality Among Veterans With Inflammatory Bowel Disease Anti-TNF Therapy and Mortality Among Veterans With IBD, 2021-03-01

• Development of the Penn Healthy Diet screener with reference to adult dietary intake data from the National Health and Nutrition Examination Survey, 2022-11-17

• Novel Risk Prediction Models for Post-Operative Mortality in Patients with Cirrhosis, 2020-12-10

• A tool kit for quantifying eukaryotic rRNA gene sequences from human microbiome samples, 2012-07-03

• Use of Population-Based Data to Demonstrate How Waitlist-Based Metrics Overestimate Geographic Disparities in Access to Liver Transplant Care, 2016-05-17

• Liver transplant center variability in accepting organ offers and its impact on patient survival, 2015-11-25

• Functional imaging of the interaction between gut microbiota and the human host: A proof-of-concept clinical study evaluating novel use for 18F-FDG PET-CT, 2018-02-15

• Efficacy of Methotrexate in Ulcerative Colitis: Failure or Promise, 2010-04-29

• Validation of a coding algorithm for intra-abdominal surgeries and adhesion-related complications in an electronic medical records database, 2016-02-10

• Validity of The Health Improvement Network (THIN) for Epidemiologic Studies of Hepatitis C Virus Infection, 2009-06-16

• Improved characterization of medically relevant fungi in the human respiratory tract using next-generation sequencing, 2014-10-25

• Administration of Antibiotics to Children Before Age 2 Years Increases Risk for Childhood Obesity, 2016-03-18

• Association between breast cancer recurrence with immunosuppression in rheumatoid arthritis and inflammatory bowel disease: A cohort study, 2016-05-04