Ali Andre Mencin, MD

Pediatric Gastroenterology
More specialties
Accepting New Patients
Treats Children
Virtual Visits/Telehealth
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Dr. Ali Andre Mencin, a general pediatric gastroenterologist, is the Chief of the Division of Pediatric Gastroenterology, Hepatology and Nutrition at NewYork-Presbyterian & Columbia University Irving Medical Center as well as the Director of the Pediatric Fatty Liver Clinic and Pediatric Endoscopy at Columbia. He is an Associate Professor of Pediatrics at Columbia, and is recognized as a Castle Connolly Top Doctor and a New York Super Doctor. Dr. Mencin sees children with a range of digestive diseases including fatty liver disease, inflammatory bowel disease, eosinophilic esophagitis, reflux, abdominal pain, constipation, cyclic vomiting syndrome, feeding difficulties, and polyposis syndromes.

Areas of Expertise / Conditions Treated

  • Abdominal Pain
  • Capsule Endoscopy
  • Celiac Disease
  • Clinical Research
  • Constipation
  • Diarrhea
  • EGD
  • Encopresis
  • Endoscopic Feeding Tube Placement
  • Endoscopy
  • Eosinophilic Esophagitis
  • Esophageal Stricture
  • Esophagitis
  • Fatty Liver Disease, Non-Alcoholic
  • Feeding Problem In Child
  • Feeding Problem In Infant
  • Feeding Tubes
  • Gastroesophageal Reflux
  • Gastroesophogeal Reflux / GERD
  • Gastrointestinal Bleeding
  • Gastrointestinal Tumors
  • Gastrostomy Tube Placement
  • Inflammatory Bowel Disease (IBD)
  • Liver Disease In Children
  • Metabolic and Fatty Liver Disease
  • Non-Alcoholic Steatohepatitis
  • Nonalcoholic fatty liver disease
  • Pediatric Crohn's Disease
  • Pediatric Gastrointestinal (GI) Endoscopy
  • Pediatric Inflammatory Bowel Disease (IBD)
  • Pediatric Nutrition
  • Percutaneous Gastrostomy Tube Inser
  • Polypectomy
  • Rectal Biopsy
  • Small Bowel Capsule Endoscopy
  • Ulcerative Colitis in Children
  • Weight Management

Academic Appointments

  • Associate Professor of Pediatrics at CUMC

Administrative Titles

  • Director, Pediatric Fatty Liver Clinic
  • Director, Pediatric Endoscopy
  • Chief, Division of Pediatric Gastroenterology, Hepatology and Nutrition

Hospital Affiliations

  • NewYork-Presbyterian / Columbia University Irving Medical Center
  • NewYork-Presbyterian Morgan Stanley Children's Hospital


  • Male

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Virtual Visits/Telehealth

Virtual Visits allow you to connect with your provider from the comfort, convenience, and safety of your own home.

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Phone Appointments

New and Existing Patients:

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Insurance Accepted


  • Aetna Signature Administrators
  • EPO
  • HMO
  • Medicare Managed Care
  • NYP Employee Plan
  • NY Signature
  • POS
  • PPO
  • Student Health

Affinity Health Plan

  • Essential Plan
  • Medicaid Managed Care

Amida Care

  • Special Needs


  • EPO
  • Great West (National)
  • HMO
  • Medicare Managed Care
  • POS
  • PPO


  • 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

  • EPO
  • HMO
  • Medicare Managed Care
  • PPO

Empire Blue Cross Blue Shield HealthPlus

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

Fidelis Care

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


  • Child/Family Health Plus
  • Leaf (Exchange)
  • Medicaid Managed Care
  • Medicare Managed Care

Local 1199

  • Local 1199

MagnaCare (National)

  • MagnaCare


  • Railroad
  • Traditional Medicare


  • Multiplan

MVP Health Care

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

Quality Health Management

  • Quality Health Management


  • Compass (Exchange)
  • Empire Plan
  • HMO
  • Medicaid (Community Plan)
  • Medicare Managed Care
  • Oxford Freedom
  • Oxford HMO
  • Oxford Liberty
  • POS
  • PPO


  • Medicare Managed Care
  • SelectHealth
  • Special Needs


  • Medicaid Managed Care
  • Medicare Managed Care

World Trade Center Health Plan

  • World Trade Center Health Plan

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

Credentials & Experience

Education & Training

  • Residency: Albert Einstein Medical Center
  • Fellowship: NewYork-Presbyterian Hospital/Columbia University Medical Center

Board Certifications

  • Pediatric Gastroenterology
  • Pediatrics
America's Top Doctor
NY Top Doctor


Research Interests

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

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

Selected Publications

Peer Reviewed Research Publications

Fernandes DM, Pantangi V, Azam M, Salomao M, Iuga AC, Lefkowitch JH, Gill J, Morotti R, Lavine JE, Mencin AA*. Pediatric Nonalcoholic Fatty Liver Disease in New York City: An Autopsy Study. J Pediatr. 2018 Sep;200:174-180. doi: 10.1016/j.jpeds.2018.04.047. Epub 2018 Jun 11. PMID: 29903531

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

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

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

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

Pierog A, Reilly N, Mencin A*. A Novel Method of GJ tube placement in Children. Gastrointest Endosc. 2013 Oct;78(4):664-7. PMID: 23810325

Dapito DH, Mencin A (joint first author), Gwak GY, Pradere JP, Schwabe RF. Promotion of Hepatocellular Carcinoma by the Intestinal Microbiota and TLR4. Cancer Cell. 2012 Apr 17;21(4):504-16. PMID: 22516259

Kluwe J, Pradere J, Gwak G, Mencin A, De Minicis S, Osterreicher C, Colmenero J, Bataller R, Schwabe RF. Modulation of Hepatic Fibrosis by c-Jun-N-terminal Kinase Inhibition. Gastroenterology. 2010 Jan;138(1):347-59. PMID: 19782079

Kikuchi I, Uchinami H, Nanjo H, Hashimoto M, Nakajima A, Kume M, Mencin A, Yamamoto Y. Clinical and Prognostic Significance of Urinary Trypsin Inhibitor in Patients with Hepatocellular Carcinoma after Hepatectomy. Annals of Surgical Oncology. 2009 Oct;16(10):2805-17. PMID: 19636634

Mencin A, Seki E, Osawa Y, Brenner D. Alpha-1 Antitrypsin Z protein (PiZ) increases hepatic fibrosis in a murine model of cholestasis. Hepatology. 2007 Nov;46(5):1443-52. PMID: 17668872

Review Articles

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

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

Mencin AA, Lavine JE. Advances in Pediatric Nonalcoholic Fatty Liver Disease. Pediatr Clin North Am. 2011 Dec;58(6):1375-92. PMID: 22093857

Mencin AA, Lavine JE. Nonalcoholic Fatty Liver Disease in Children. Curr Opin Clin Nutr Metab Care. 2011 Mar;14(2):151-7. PMID: 21178608

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

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

Kluwe, J, Mencin A, Schwabe RF. Toll-like receptor, inflammation and carcinogenesis. Journal of Molecular Medicine. 2009 Feb;87(2):125-38. PMID: 19089397

Braganza SF, Galvez MP, Mencin A, Ozuah PP. Weighting the appropriate uses of supplemental zinc. Contemporary Pediatrics. 2006 Jul: Published online

Mencin A., Adam H. Antibiotic Susceptibility Testing. Pediatrics in Review. 2004; 25: 110-111.

Case Reports

Pierog, A. Mencin A*. A Childhood Case of Eosinophilic Gastritis and Protein Losing Enteropathy. Clin Pediatr (Phila). 2014 Mar;53(3):289-92s. 2013 PMID: 24351503

Weitz N, Patel V, Tlougan B, Mencin A. et al. Metastatic Cutaneous Involvement of Granulomatous Colitis in Hermansky-Pudlak Syndrome. Pediatr Dermatol. 2013 Nov-Dec;30(6):e278-80. PMID: 22471786

Mencin A, DeFelice A, Marcowitz D, et al. An Unusual Cause of Severe Gastrointestinal Bleeding: Case Report and Review of the Pediatric Literature on Heterotopic Gastric Mucosa of the Biliary Tract. Clinical Pediatrics. 2006 Sep;45(7):683-7. PMID: 16928850

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.