Specific code 2014 ICD-9-CM Diagnosis Code 540.0
Acute appendicitis with generalized peritonitis
  • Billable Code
  • Short description: Ac append w peritonitis.
  • ICD-9-CM 540.0 will be replaced by an equivalent ICD-10-CM code (or codes) when the United States transitions from ICD-9-CM to ICD-10-CM on October 1, 2015.
  • ICD-9-CM 540.0 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Acute appendicitis w generalized peritonitis
  • Acute appendicitis w localized peritonitis
  • Acute appendicitis with localized peritonitis
  • Acute appendicitis, gangrenous, with peritonitis
  • Acute gangrenous appendicitis w perforation, peritonitis
  • Acute gangrenous appendicitis with perforation AND peritonitis
  • Appendicitis w perforation
  • Appendicitis with perforation
  • Appendicitis, acute W generalized peritonitis
  • Appendicitis, generalized peritonitis (infection)
  • Localized peritonitis due to acute appendicitis
  • Rupture of appendix
540.0 Excludes
  • acute appendicitis with peritoneal abscess (540.1)
Applies To
  • Appendicitis (acute) with: perforation, peritonitis (generalized), rupture:
    • fulminating
    • gangrenous
    • obstructive
  • Cecitis (acute) with: perforation, peritonitis (generalized), rupture
  • Rupture of appendix
Convert to ICD-10-CM: 540.0 converts directly to:
  • 2014 ICD-10-CM K35.2 Acute appendicitis with generalized peritonitis
ICD-9-CM Volume 2 Index entries containing back-references to 540.0:
  • Appendicitis 541
    • with
      • perforation, peritonitis (generalized), or rupture 540.0
        • with peritoneal abscess 540.1
      • peritoneal abscess 540.1
    • acute (catarrhal) (fulminating) (gangrenous) (inflammatory) (obstructive) (retrocecal) (suppurative) 540.9
      • with
        • perforation, peritonitis, or rupture 540.0
          • with peritoneal abscess 540.1
        • peritoneal abscess 540.1
  • Perforation, perforative (nontraumatic)
    • appendix 540.0
      • with peritoneal abscess 540.1
    • cecum 540.0
      • with peritoneal abscess 540.1
  • Peritonitis (acute) (adhesive) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion) 567.9
    • with or following
      • abortion - see Abortion, by type, with sepsis
      • abscess 567.21
      • appendicitis 540.0
        • with peritoneal abscess 540.1
      • ectopic pregnancy (see also categories 633.0-633.9) 639.0
      • molar pregnancy (see also categories 630-632) 639.0
  • Rupture, ruptured 553.9
    • appendix (with peritonitis) 540.0
      • with peritoneal abscess 540.1
      • traumatic - see Injury, internal, gastrointestinal tract
    • cecum (with peritonitis) 540.0
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 540.0 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2014 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.