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Ali Andre Mencin, MD

Board Certifications: 
Pediatric Gastroenterology, Pediatrics
Accepting New Patients
Treats Children
Profile Headshot


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Phone Appointments

New and Existing Patients: 
(212) 305-5903


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Credentials & Experience

America's Top Doctor

Board Certifications

  • Pediatric Gastroenterology
  • Pediatrics

Clinical Expertise

  • Eosinophilic Esophagitis
  • Congenital Diaphragmatic Hernia
  • Pediatric Liver Disease-Chronic
  • Pediatric Liver Disease-Acute
  • Fatty Liver Disease, Non-Alcoholic
  • Inflammatory Bowel Diseases (IBD)
  • Constipation
  • Pediatric Nutrition
  • Advanced Endoscopy

Education & Training

  • Mount Sinai School of Medicine
  • Residency: Albert Einstein Medical Center
  • Fellowship: NewYork-Presbyterian Hospital/Columbia University Medical Center

About Ali Mencin

Dr. Ali Andre Mencin is an Assistant Professor of Pediatrics and a general pediatric gastroenterologist recognized as a Castle Connolly Top Doctor as well as a New York Super Doctor. In addition to seeing children with a range of digestive diseases, his primary clinical interests are pediatric fatty liver disease and pediatric endoscopy.

Dr. Mencin is a member of the Nonalcoholic Steatohepatitis Clinical Research Network sponsored by the National Institute of Diabetes and Digestive and Kidney Disease. He is the Director of the Pediatric Fatty Liver Clinic at Columbia University Medical Center and actively recruits patients suffering from this disease for observational and treatment studies. As a recognized expert in pediatric fatty liver, he has published extensively in this area.

Furthermore, Dr. Mencin is a skilled endoscopist as well as capsule endoscopist who serves as the Director of Pediatric Endoscopy at Columbia. He follows patient populations that require frequent endoscopies including those with polyposis syndromes, inflammatory bowel disease, and eosinophilic esophagitis. He has a particular interest in gastrojejunostomy tube (GJT) placements in children with severe reflux and has published on his GJT placement technique. Dr. Mencin is currently a member of the Endoscopy Committee for the North American Society for Pediatric Gastroenterology Hepatology and Nutrition.

Academic Titles

  • Assistant Professor of Pediatrics at CUMC

Administrative Positions

  • Director, Pediatric Fatty Liver Clinic

Hospital Affiliations

  • NewYork-Presbyterian/Columbia
  • NewYork-Presbyterian/Morgan Stanley Children's Hospital


  • Male

Insurance Accepted


  • EPO
  • HMO
  • Medicare Managed Care
  • NY Signature
  • POS
  • PPO
  • Signature Administrators
  • Student Health


  • Essential Plan
  • Medicaid Managed Care
  • Medicare Managed Care

Amida Care

  • Special Needs Plan


  • EPO
  • Great West
  • HMO
  • POS
  • PPO


  • HMO
  • Medicare Managed Care
  • PPO


  • ConnectiCare
  • EPO
  • Essential Plan
  • HMO
  • Medicaid Managed Care
  • Medicare Managed Care
  • POS
  • PPO
  • Select Care (Exchange)
  • Vytra

Empire Blue Cross Blue Shield

  • Blue Priority
  • EPO
  • HMO
  • Medicare (Mediblue)
  • NYP Employee Plan
  • Pathway (Exchange)
  • POS
  • PPO

Empire Blue Cross Blue Shield HealthPlus

  • Child/Family Health Plus
  • Essential Plan
  • Medicaid Managed Care

Fidelis Care

  • Child/Family Health Plus
  • Medicaid Managed Care
  • Medicare Managed Care


  • Child/Family Health Plus
  • Medicaid Managed Care
  • Medicare Managed Care

Local 1199

  • Local 1199


  • MagnaCare


  • Multiplan

Oxford Health Plans

  • Freedom
  • Liberty
  • Medicare Managed Care


  • Columbia University Employee Plan
  • Compass (Exchange)
  • EPO
  • Essential Plan
  • HMO
  • Medicaid (Community Plan)
  • Medicare Managed Care
  • POS
  • PPO


  • Medicare Managed Care
  • SelectHealth


  • Medicaid Managed Care
  • Medicare Managed Care

*Please contact the provider’s office directly to verify that your particular insurance is accepted.

Contact & Locations

3959 Broadway
Suite 702
New York, New York 10032
(212) 305-5903
(212) 342-5756
270 West 231st Street
Bronx, New York 10463
(212) 305-5903


Research Interests

  • Non Alcoholic Fatty Liver Disease (NAFLD)
  • Liver Fibrosis
  • Inflammatory Bowel Disease
  • Eosinophilic Gastrointestinal Disorders
  • Endoscopy and Capsule Endoscopy

Clinical Trials

NCT02093663 A Phase 3, Multicenter, Randomized, Double-blind Study to Determine the Safety and Efficacy of MMX Mesalamine/Mesalazine in Pediatric Subjects With Mild to Moderate Ulcerative Colitis, in Both Acute and Maintenance Phases

NCT02819323 A Safety and Efficacy Study of a Bowel Cleansing Preparation (BLI800) in Pediatric Subjects Undergoing Colonoscopy



Jul 1 2014 - Jun 30 2019


Mar 1 2011 - Feb 28 2013

Selected Publications

Peer Reviewed: Research Investigations (Mentees underlined and * indicates senior author)

  1. Picoraro JA, Pierog A, Reilly NR, Mencin AA*. Gastrojejunal tube placement through an established gastrostomy via an endoscopic transgastric approach in a pediatric population. Gastrointest Endosc. 2015 Jul 28. PMID 26232359. Author Interview: 12/2015
  2. Pierog A, Martinez M, Mencin A*. Outpatient endoscopic closure of persistent gastrocutaneous fistula with hemoclips in pediatric patients. Gastrointest Endosc. 2014 Dec;80(6):1190-3. PMID 25281501
  3. Pierog A. Aspelund G, Farkouh-Karoleski C, Wu M, Kriger J, Wynn J, Krishnan U, Mencin A*. Predictors of low weight and tube feedings in children with congenital diaphragmatic hernia at one year of age. J Pediatr Gastroenterol Nutr.  2014 Oct;59(4):527-30. PMID: 24918983
  4. Pierog A, Mencin A, Rizkalla-Reilly N. Fecal Microbiota Transplantation in Children with Recurrent Clostridium difficile Infection.  Pediatr Infect Dis J. 2014 Nov;33(11):1198-20. PMID: 24853539

Review Articles

  1. Huang YY, Li L, Monteleone M, Ferrari L, States LJ, Riviello JJ, Kernie SG, Mencin AA, Gupta S, Sun LS. Use of Anesthesia for Imaging Studies and Interventional Procedures in Children. J Neurosurg Anesthesiol. 2016. Epub ahead of print. PMID 27564559
  2. Mencin AA, Loomba R, Lavine JE. Caring for children with NAFLD and navigating their care into adulthood. Nat Rev Gastroenterol Hepatol. 2015 Nov;12(11):617-28. PMID 26323878
  3. Mencin AA, Lavine JE. Advances in Pediatric Nonalcoholic Fatty Liver Disease. Pediatr Clin North Am. 2011 Dec;58(6):1375-92. PMID: 22093857
  4. Mencin AA, Lavine JE. Nonalcoholic Fatty Liver Disease in Children.  Curr Opin Clin Nutr Metab Care. 2011 Mar;14(2):151-7. PMID: 21178608
  5. Pradere JP, Troeger JS, Dapito DH, Mencin AA, Schwabe RF. Toll Like Receptor 4 and Hepatic Fibrogenesis. Semin Liver Dis. 2010 Aug;30(3):232-44. PMID: 20665376
  6. Mencin A, Kluwe J, Schwabe R. Toll Like Receptors as Targets to Treat Chronic Liver Diseases. Gut. 2009 May;58(5):704-20. PMID: 19359436

Book Chapters

Mencin A, Lavine JE. “Chapter 22: Many of my obese patients have elevated liver chemistries—what should my approach be to this finding?” Curbside Consultation in Pediatric GI. Ed. Joel Rosh.MD. Thorofare: Slack Inc., 2013. 107-110.