APPENDICITIS (540-543)

• 540 Acute appendicitis
  • 540.0 With generalized peritonitis
    • Appendicitis (acute) with: perforation, peritonitis (generalized), rupture:
      • fulminating
      • gangrenous
      • obstructive
    • Cecitis (acute) with: perforation, peritonitis (generalized), rupture
    • Rupture of appendix
    • Excludes: acute appendicitis with peritoneal abscess (540.1)
  • 540.1 With peritoneal abscess
    • Abscess of appendix
      • With generalized peritonitis
  • 540.9 Without mention of peritonitis
    • Acute:
      • appendicitis without mention of perforation, peritonitis, or rupture:
        • fulminating
        • gangrenous
        • inflamed
        • obstructive
      • cecitis without mention of perforation, peritonitis, or rupture
• 541 Appendicitis, unqualified
• 542 Other appendicitis
  • Appendicitis:
    • chronic
    • recurrent
    • relapsing
    • subacute
  • Excludes: hyperplasia (lymphoid) of appendix (543.0)
• 543 Other diseases of appendix
  • 543.0 Hyperplasia of appendix (lymphoid)
  • 543.9 Other and unspecified diseases of appendix
    • Appendicular or appendiceal:
      • colic
      • concretion
      • fistula
    • Diverticulum of appendix
    • Fecalith of appendix
    • Intussusception of appendix
    • Mucocele of appendix
    • Stercolith of appendix