Jefferson University Hospitals

Physician Profile

Leo Katz, MD

Jefferson University Physician

Academic Title: Clinical Associate Professor

Gastroenterology - Barrett's Esophagus
Gastroenterology - Celiac Disease and Management
Gastroenterology - Colon Disease
Gastroenterology - Colonoscopy Screening/Diagnostic
Gastroenterology - Esophageal Disease
Gastroenterology - GI Cancer (Colon, Rectal, Liver, Bile Duct, Esophagus)
Gastroenterology - Gastrointestinal Bleed and Ulcers
Gastroenterology - General
Gastroenterology - Inflammatory Bowel Disease (Crohn's and Colitis)
Gastroenterology - Irritable Bowel Syndrome
Gastroenterology - Motility and Swallowing Disorders

Make An Appointment

Click to call 1-800-JEFF-NOW (800-533-3669) or

Office Locations

132 South 10th Street
Suite 480
Philadelphia PA 19107
Phone: (215) 955-8900
443 Laurel Oak Road
1st Floor
Voorhees NJ 08043
Phone: (215) 955-8900

Medical Services

Years in Practice


Board Certifications

  • Internal Medicine
  • Gastroenterology

Hospital Affiliation / Admitting Privileges

  • Thomas Jefferson University Hospital
  • Methodist Hospital Division of Thomas Jefferson University Hospital

Personal Statement

Dr. Katz is Board Certified in Internal Medicine and Gastroenterology. He is a fellow of the American College of Physicians and the American Gastroenterological Association. He has been named a Top Doctor, Super Doctor, Best Physician, and Top Gastroenterologist in numerous publications. He has a special interest in patient satisfaction, quality and service excellence and trains physicians and healthcare professionals in ways to improve interaction with patients and families.


  • SUNY at Upstate Medical Center, Medical School


  • Thomas Jefferson University Hospital


  • Thomas Jefferson University Hospital


  • Thomas Jefferson University Hospital

Recent Publications

Bioactivity of oral linaclotide in human colorectum for cancer chemoprevention

AMG 151 (ARRY-403), a novel glucokinase activator, decreases fasting and postprandial glycaemia in patients with type 2 diabetes

Romosozumab in postmenopausal women with low bone mineral density

Randomised clinical trial: Polyethylene glycol 3350 with sports drink vs. polyethylene glycol with electrolyte solution as purgatives for colonoscopy - The incidence of hyponatraemia

Design and methods of a postmarketing pharmacoepidemiology study assessing long-term safety of Prolia® (denosumab) for the treatment of postmenopausal osteoporosis

The effect on colon visualization during colonoscopy of the addition of simethicone to polyethylene glycol-electrolyte solution: A randomized single-blind study

The development of denosumab for the treatment of diseases of bone loss and cancer-induced bone destruction

Initial therapy with the fixed-dose combination of sitagliptin and metformin results in greater improvement in glycaemic control compared with pioglitazone monotherapy in patients with type 2 diabetes

Risk of acute renal failure in patients with Type 2 diabetes mellitus

Characteristics of patients prescribed sitagliptin and other oral antihyperglycaemic agents in a large US claims database

Patients with type 2 diabetes mellitus have higher risk for acute pancreatitis compared with those without diabetes

Efficacy of morning-only compared with split-dose polyethylene glycol electrolyte solution for afternoon colonoscopy: A randomized controlled single-blind study

Efficacy and safety of sitagliptin when added to insulin therapy in patients with type 2 diabetes

A validation study of 3 grading systems to evaluate small-bowel cleansing for wireless capsule endoscopy: a quantitative index, a qualitative evaluation, and an overall adequacy assessment

Is single-cell apoptosis sufficient for the diagnosis of graft-versus-host disease in the colon?

Safety of Sodium Phosphate Tablets in Patients Receiving Propofol-based Sedation for Colonoscopy

Safety of sodium phosphate for colonoscopy [1] (multiple letters)

Fatal hyperkalemia related to combined therapy with a COX-2 inhibitor, ACE inhibitor and potassium rich diet