Leonard Biener Weinstock, MD Gastroenterology and Internal Medicine

Dr. Leonard Biener Weinstock, MD

Gastroenterology and Internal Medicine
St. Louis, MO 63141
Accepting New Patients Visit Website
(314) 997-0554

Patients’ Perspective

  • On-time appointments
  • Friendly staff
  • Takes time to answer questions

About Leonard Biener Weinstock MD

Dr. Leonard Biener Weinstock, MD is a health care provider primarily located in St. Louis, MO. He has 41 years of experience. His specialties include Gastroenterology and Internal Medicine. Dr. Weinstock is affiliated with Barnes Jewish West County Hospital. He speaks English.

Leonard Weinstock has received the following award:


Specialists In Gastroenterology 11525 Olde Cabin Rd St. Louis, MO 63141


Dr. Leonard Biener Weinstock has the following 2 specialties

Specialty Expertise

Dr. Leonard Biener Weinstock has the following 15 areas of expertise

  • Crohn's Disease
  • Celiac Disease
  • Gastrointestinal Endoscopy
  • Irritable Bowel Syndrome (IBS)
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Intestinal Polyps
  • Abdominal Pain
  • Hemorrhoids
  • Constipation
  • Hepatitis C
  • Colon Cancer
  • Colonic Diseases
  • Colonoscopy
  • Acid Reflux Disease (GERD)
  • Ulcerative Colitis


1 Award

  • Vitals Preferred Provider

    • Vitals Preferred Provider Award
      • Preferred Provider badge recognizes providers that are committed to transparency, responsiveness and great service to patients, and have earned a high patient satisfaction rating.


41 Years Experience

University Of Rochester School Of Medicine & Dentistry

Graduated in 1981

Rochester General Hospital


Dr. Leonard Biener Weinstock Accepts the Following Insurance

  • Aetna Choice POS II
  • Aetna HMO
  • Aetna Managed Choice POS Open Access
  • Aexcel PPO
  • Anthem Blue Access PPO
  • Anthem Blue Preferred HMO
  • Anthem Blue Preferred Plus POS
  • Anthem MO Blue Preferred Options
  • Anthem MO Direct Access w/HSA
  • Anthem MO Pathway X
  • BCBS Blue Card PPO
  • BCBS KC Preferred Care Blue PPO
  • Blue Choice Preferred Care
  • Cigna Connect Network - MO
  • CIGNA LocalPlus
  • CIGNA Open Access Plus
  • Connect Network - MO
  • Coventry KS PPO
  • Coventry MO HMO POS
  • Coventry MO PPO
  • Coventry OA EPO Exchange - KS/MO
  • CoventryOne PPO Network
  • First Health PPO
  • HealthLink PPO
  • Humana Choice POS
  • Humana ChoiceCare Network PPO
  • Multiplan PPO
  • Pathway X - MO
  • UHC Choice Plus POS
  • UHC Navigate HMO
  • UHC Navigate POS
  • UHC Options PPO

More about Dr. Leonard Biener Weinstock

Dr. Weinstock is board certified in internal medicine and gastroenterology, Leonard Weinstock, MD, provides compassionate care to patients at Specialists in Gastroenterology in St. Louis, Missouri. 

Dr. Weinstock was born and raised in New York and moved to St. Louis in 1985. He received his medical training in Rochester, New York, and completed his gastroenterology fellowship at Washington University in St. Louis. 

He has a clinical teaching appointment as an Associate Professor of Clinical Medicine and Surgery at the Washington University School of Medicine. Dr. Weinstock’s lectures and research on diseases of the esophagus, stomach, small intestine, and colon have been presented at national and international conferences. He is actively researching the connection of the gut and small intestinal bacterial overgrowth (SIBO) with several medical problems, including restless legs syndrome and chronic pelvic pain syndromes. He presented several lectures in Oregon at the first SIBO symposium and in France at the international rosacea study group.

Dr. Weinstock provides individualized care to all adult patients with gastrointestinal disorders. His clinical practice emphasizes colon cancer screening, therapeutic videoendoscopy, motility disorders, management of irritable bowel syndrome, and comprehensive management of inflammatory bowel disease. His experience in treating IBS patients who have SIBO dates back to 2000. He has expertise in the use of low-dose naltrexone, which is one of the few modalities that promote the reduction of inflammation by increasing endorphins.

Dr. Weinstock is married and has twin daughters.