Acute appendicitis with loc peritonitis and gangr, w/o perf

This code signifies an acute inflammation of the appendix that has progressed to tissue death (gangrene) and has caused localized inflammation of the abdominal lining (peritoneum), but without a full rupture or hole in the appendix wall. It represents a severe stage of appendicitis requiring urgent surgical intervention.

Use this code when documentation explicitly states acute appendicitis with both gangrene and localized peritonitis, and specifically notes the absence of perforation. This typically occurs when the surgeon's operative report or pathologist's report confirms these specific findings.

• Ensure documentation clearly differentiates between localized and generalized peritonitis.
• Verify the absence of perforation; if perforation is present, a different code is required.
• This code often sequences as the primary diagnosis for appendectomy procedures.