Mumps hepatitis

This code signifies inflammation of the liver (hepatitis) specifically caused by a mumps virus infection. It indicates a systemic manifestation of mumps, where the virus has affected hepatic function, leading to symptoms such as jaundice, abdominal pain, and elevated liver enzymes.

Apply this code when documentation clearly states a diagnosis of hepatitis directly attributable to a mumps infection. This typically occurs in patients presenting with classic mumps symptoms (e.g., parotitis) alongside evidence of liver involvement, confirmed by laboratory findings and clinical assessment.

• Ensure documentation explicitly links the hepatitis to mumps; do not assume causality.
• Code the underlying mumps infection (B26.xx) as the primary diagnosis if the hepatitis is a manifestation.
• Do not use this code for hepatitis from other viral etiologies; ensure mumps is the confirmed cause.