| ICD-10 Code | Description |
| K35.200 | Acute appendicitis with generalized peritonitis, without perforation or abscess |
| K35.201 | Acute appendicitis with generalized peritonitis, with perforation, without abscess |
| K35.209 | Acute appendicitis with generalized peritonitis, without abscess, unspecified as to perforation |
| K35.210 | Acute appendicitis with generalized peritonitis, without perforation, with abscess |
| K35.211 | Acute appendicitis with generalized peritonitis, with perforation and abscess |
| K35.219 | Acute appendicitis with generalized peritonitis, with abscess, unspecified as to perforation |
| K35.30 | Acute appendicitis with localized peritonitis, without perforation or gangrene |
| K35.31 | Acute appendicitis with localized peritonitis and gangrene, without perforation |
| K35.32 | Acute appendicitis with perforation, localized peritonitis, and gangrene, without abscess |
| K35.33 | Acute appendicitis with perforation, localized peritonitis, and gangrene, with abscess |
| K35.80 | Unspecified acute appendicitis |
| K35.890 | Other acute appendicitis without perforation or gangrene |
| K35.891 | Other acute appendicitis without perforation, with gangrene |
