Chronic liver scarring (cirrhosis) leading to liver dysfunction (from malnutrition, etc.)
Because the rating criteria follow either your MELD score or your symptoms, two kinds of medical records carry the most weight. First, laboratory and imaging results that produce or support a MELD score — typically serum bilirubin, serum creatinine, INR, and serum sodium — directly place you within a rating tier. Note (2) requires that biochemical studies, imaging studies, or a biopsy confirm liver dysfunction, including findings such as hyponatremia, thrombocytopenia, or coagulopathy.
Second, records documenting specific complications matter at the higher tiers. Hospital or clinic notes showing a diagnosis of ascites, spontaneous bacterial peritonitis, hepatic encephalopathy, variceal hemorrhage, coagulopathy, portal gastropathy, or hepatopulmonary or hepatorenal syndrome support a 100% rating. Records of any such episode within the past year, paired with notes of daily fatigue, are relevant to the 60% level. Imaging showing splenomegaly or ascites, alongside provider notes of weakness, anorexia, abdominal pain, or malaise, support the 30% level. Provider notes or your own statements describing anorexia, weakness, abdominal pain, or malaise without the complications above support the 10% level. Statements from you or people who know you describing how daily symptoms affect work and daily activities can help show the frequency and severity of those symptoms across all tiers.
Conditions that are often caused or made worse by this one. If you have any of these, they may be claimable as secondary service connection.