ICD-10-CM · Chapter 11 · K00-K95
K35 Acute appendicitis
Subcodes
Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.
| Code | Description | Billable |
|---|---|---|
| K35..2 | Acute appendicitis with generalized peritonitis | No |
| K35..20 | Acute appendicitis with generalized peritonitis, without abscess | No |
| K35..200 | Acute appendicitis with generalized peritonitis, without perforation or abscess | Yes |
| K35..201 | Acute appendicitis with generalized peritonitis, with perforation, without abscess | Yes |
| K35..209 | Acute appendicitis with generalized peritonitis, without abscess, unspecified as to perforation | Yes |
| K35..21 | Acute appendicitis with generalized peritonitis, with abscess | No |
| K35..210 | Acute appendicitis with generalized peritonitis, without perforation, with abscess | Yes |
| K35..211 | Acute appendicitis with generalized peritonitis, with perforation and abscess | Yes |
| K35..219 | Acute appendicitis with generalized peritonitis, with abscess, unspecified as to perforation | Yes |
| K35..3 | Acute appendicitis with localized peritonitis | No |
| K35..30 | Acute appendicitis with localized peritonitis, without perforation or gangrene | Yes |
| K35..31 | Acute appendicitis with localized peritonitis and gangrene, without perforation | Yes |
| K35..32 | Acute appendicitis with perforation, localized peritonitis, and gangrene, without abscess | Yes |
| K35..33 | Acute appendicitis with perforation, localized peritonitis, and gangrene, with abscess | Yes |
| K35..8 | Other and unspecified acute appendicitis | No |
| K35..80 | Unspecified acute appendicitis | Yes |
| K35..89 | Other acute appendicitis | No |
| K35..890 | Other acute appendicitis without perforation or gangrene | Yes |
| K35..891 | Other acute appendicitis without perforation, with gangrene | Yes |
Plain-language term for this code
The following entry in the US Medical Glossary corresponds to ICD-10-CM category K35:
- Appendicitis — Apendicitis
Last reviewed: September 2026