About Alan Mullen, MD, PhD

Alan Mullen, MD, PhD is an Associate Professor of Medicine at Harvard Medical School, Assistant in Medicine at MGH and a member of the MGH Liver Center.

Dr. Mullen's clinical interests are focused on treating patients with chronic liver disease including patients who have progressed to liver fibrosis and cirrhosis.  In his practice he cares for patients with conditions including hepatitis A, hepatitis B and hepatitis C, non-alcoholic fatty liver disease (NAFLD), autoimmune hepatitis, cholestatic liver disease including primary biliary cirrhosis (PBC) and primary sclerosing cholangitis (PSC) as well as inherited conditions including hemochromatosis and alpha-1-antitrypsin deficiency.  He also evaluates patients for abnormal liver function tests and abnormal liver imaging. 

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Mass General Gastroenterology
55 Fruit St.
Boston, MA 02114
Phone: 617-726-2426

Medical Education

  • MD, University of Pennsylvania School of Medicine

American Board Certifications

  • Gastroenterology, American Board of Internal Medicine

Accepted Insurance Plans

Note: This provider may accept more insurance plans than shown; please call the practice to find out if your plan is accepted.


We are just beginning to understand the extent to which long noncoding RNAs regulate human development and disease.  My laboratory focuses on understanding how long noncoding RNAs regulate embryonic stem cell differentiation and how they regulate the development of liver fibrosis.  We use a combined approach of genomics, genetics, and biochemistry to understand how long noncoding RNAs regulate the earliest stages in differentiation towards the gastrointestinal system and how long noncoding RNAs regulate the function of hepatic stellate cells, the primary cell type responsible for liver fibrosis. 

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