A hepatologist is the doctor who specializes in the liver. Hepatologists diagnose and treat diseases of the liver, gallbladder, bile ducts, and pancreas, though in practice they focus most heavily on liver conditions like cirrhosis, hepatitis, and fatty liver disease. Most people with liver concerns will first see a gastroenterologist, the broader specialty that covers the entire digestive system. Hepatologists are gastroenterologists who have pursued additional, focused training in liver disease.
Hepatologist vs. Gastroenterologist
Every hepatologist is a gastroenterologist, but not every gastroenterologist is a hepatologist. A general gastroenterologist handles a wide range of digestive issues, from acid reflux to inflammatory bowel disease, and is more commonly the doctor you’d see for gallbladder or pancreas problems. A hepatologist narrows that focus to the liver itself. Think of it as the difference between a general cardiologist and one who only handles heart rhythm disorders.
For straightforward liver concerns, like mildly elevated liver enzymes found on routine blood work, a general gastroenterologist can often manage your care. A hepatologist becomes important when the condition is complex, progressive, or potentially headed toward liver failure. If your primary care doctor finds signs of acute hepatitis along with problems in blood clotting or confusion (a sign the liver isn’t clearing toxins properly), guidelines from the American College of Gastroenterology call for immediate referral to a liver specialist.
What a Hepatologist Treats
Hepatologists manage the full range of liver diseases, including:
- Fatty liver disease (MASLD), formerly called nonalcoholic fatty liver disease (NAFLD). This is now the most common liver condition worldwide, linked to metabolic risk factors like elevated blood sugar, high blood pressure, and obesity.
- Viral hepatitis (hepatitis A, B, and C)
- Alcoholic liver disease
- Autoimmune liver disease, where the immune system attacks liver cells or bile ducts
- Genetic liver diseases, such as Wilson’s disease or hereditary hemochromatosis
- Drug-induced liver injury, caused by medications or supplements that damage the liver
- Cirrhosis, the late-stage scarring that can result from many of these conditions
- Noncancerous liver tumors
The updated name for fatty liver disease, MASLD (metabolic dysfunction-associated steatotic liver disease), was adopted in 2023. If you see either term in your medical records, they refer to the same condition. The name was changed because the older term relied on the word “nonalcoholic,” which didn’t capture what actually drives the disease: metabolic factors like insulin resistance, high triglycerides, and excess weight.
Transplant Hepatologists
When liver disease progresses to the point where the organ can no longer function, a transplant hepatologist enters the picture. This is a separate board certification on top of gastroenterology, requiring an additional 12 months of fellowship training at a transplant center accredited by the ACGME. To sit for the transplant hepatology certification exam through the American Board of Internal Medicine, a physician must already be board-certified in gastroenterology.
Transplant hepatologists don’t perform the surgery itself. That’s the transplant surgeon’s role. Instead, the hepatologist evaluates whether you’re a candidate for transplant, manages your liver disease in the months or years leading up to surgery, and handles your medical care afterward, including monitoring for organ rejection and managing complications like the buildup of toxins that can affect brain function. At centers like Mayo Clinic, the transplant hepatologist and transplant surgeon work as a team with clearly divided responsibilities: the hepatologist owns the medical management, the surgeon owns the operating room.
How Hepatologists Diagnose Liver Problems
Your first appointment with a liver specialist typically runs one to two hours, with about an hour spent directly with the doctor. You’ll discuss your medical history, current symptoms, medications (including over-the-counter drugs and supplements), and alcohol use. Blood tests called a liver panel measure enzymes and proteins that reveal how well the liver is functioning and whether it’s inflamed or damaged.
One of the most useful tools in a hepatologist’s practice is a FibroScan, a painless test that measures liver stiffness and fat content using ultrasound technology. You lie on your back with your right arm raised, and a small probe placed between your ribs delivers about 10 quick pulses that feel like light taps. The machine tracks how fast sound waves travel through the liver: faster waves mean stiffer tissue, which indicates scarring. The entire scan takes roughly 10 minutes and avoids the needle and sedation that come with a traditional liver biopsy.
Biopsies are still sometimes necessary, particularly when results are ambiguous or when the doctor needs to assess the exact type and severity of damage at a cellular level. Imaging like CT scans and MRIs also play a role, especially when evaluating liver tumors. In some cases of cirrhosis-related liver cancer, imaging alone can confirm the diagnosis without a biopsy.
Pediatric Liver Specialists
Children with liver disease see a pediatric hepatologist, a doctor who completed a three-year fellowship in pediatric gastroenterology before pursuing an additional 12 months of transplant hepatology training. Their scope covers conditions unique to or especially impactful in childhood: metabolic liver diseases that may present at birth, chronic cholestasis (impaired bile flow), autoimmune hepatitis, and acute liver failure requiring intensive care. A major part of their training focuses on how chronic liver disease affects growth and development, something that simply isn’t a factor in adult care. They also manage nutritional support, since a struggling liver in a growing child creates nutritional challenges that require close attention.
How to Get a Referral
Most people reach a hepatologist through their primary care doctor or a gastroenterologist. If routine blood work shows elevated liver enzymes, your primary care doctor will typically repeat the tests and run additional panels to narrow down the cause. Mild, stable elevations might be monitored over time. Persistent or significantly elevated results, unexplained liver symptoms (like jaundice, persistent fatigue, or upper-right abdominal pain), or imaging that reveals liver abnormalities will prompt a referral to a gastroenterologist or directly to a hepatologist.
If you already know you have a chronic liver condition, like hepatitis B or early-stage fatty liver disease, asking your primary care doctor for a hepatologist referral is reasonable, especially if the disease is progressing or you want a specialist’s perspective on management. Transplant hepatologists specifically practice at medical centers where liver transplants are performed, so seeing one may require traveling to a larger academic hospital or transplant center.