Acute abdomen

This code represents a sudden onset of severe abdominal pain, often accompanied by tenderness, guarding, or rigidity, indicating a potentially serious underlying intra-abdominal condition requiring immediate medical attention. It is a general term used when a more specific diagnosis has not yet been established.

Use this code when the physician documents "acute abdomen" as the primary diagnosis, typically in an emergency department or acute care setting, prior to definitive diagnosis. This code is appropriate when the clinical picture strongly suggests an acute intra-abdominal process but the specific etiology (e.g., appendicitis, cholecystitis) is not yet confirmed.

• Do not code this if a more specific diagnosis for the abdominal pain is documented (e.g., appendicitis, diverticulitis).
• Review documentation for laterality or specific quadrant pain, as these would lead to more specific R10.1-R10.3- codes.
• This code is often a temporary diagnosis and should be updated to a more specific diagnosis once confirmed.