What ICD-10 Codes are Used for Acute Appendicitis
Here are several acute appendicitis ICD codes you can use for patients with acute appendicitis:
- K35.20 - Acute appendicitis with generalized peritonitis, without abscess
This ICD-10 code is meant to be used on a patient confirmed to have acute appendicitis (the inflammation of the appendix) and generalized peritonitis (the inflammation of the peritoneum). Despite having these, the patient has no abscesses.
- K35.21 - Acute appendicitis with generalized peritonitis, with abscess
This is the same as Item 1, but this time, there is an abscess.
- K35.30 - Acute appendicitis with localized peritonitis, without perforation or gangrene
This ICD-10 code is meant to be used on a patient with acute appendicitis with localized peritonitis (this type of peritonitis is confined in a certain region of the peritoneal cavity). Despite having both of these, the patient has no perforation (holes) and gangrene (tissue death due to bacterial infections/lack of blood flow).
- K35.31 - Acute appendicitis with localized peritonitis and gangrene, without perforation
This is the same as Item 3, but this time, the patient has gangrene but no perforations.
- K35.32 - Acute appendicitis with perforation, localized peritonitis, and gangrene, without abscess
This is the same as Item 3, but this time, the patient has perforations and gangrene, but there are no abscesses.
- K35.33 - Acute appendicitis with perforation, localized peritonitis, and gangrene, with abscess
This is the same as Item 5, but the patient has abscesses this time.
