ICD-10-CM · Chapter 11 · K00–K95
K35.80
Unspecified acute appendicitis
Diseases of the digestive system
Quick facts
- Code
- K35.80
- Type
- Billable code
- ICD-10-CM chapter
- Chapter 11 — Diseases of the digestive system
- Category
- K35 — Acute appendicitis
- Specificity
- 5 characters
How coders use this code
ICD-10-CM K35.80 is a billable, fully specified code, so it can be reported directly on a claim to document a diagnosis of unspecified acute appendicitis. Coders assign it when the chart documentation supports this level of detail, always matching to the most specific code available and verifying against the chapter-specific guidelines published annually by NCHS/CMS.
Related codes in K35
- K35Acute appendicitis
- K35.2Acute appendicitis with generalized peritonitis
- K35.20Acute appendicitis with generalized peritonitis, without abscess
- K35.200Acute appendicitis with generalized peritonitis, without perforation or abscess
- K35.201Acute appendicitis with generalized peritonitis, with perforation, without abscess
- K35.209Acute appendicitis with generalized peritonitis, without abscess, unspecified as to perforation
- K35.21Acute appendicitis with generalized peritonitis, with abscess
- K35.210Acute appendicitis with generalized peritonitis, without perforation, with abscess
- K35.211Acute appendicitis with generalized peritonitis, with perforation and abscess
- K35.219Acute appendicitis with generalized peritonitis, with abscess, unspecified as to perforation
- K35.3Acute appendicitis with localized peritonitis
- K35.30Acute appendicitis with localized peritonitis, without perforation or gangrene
- K35.31Acute appendicitis with localized peritonitis and gangrene, without perforation
- K35.32Acute appendicitis with perforation, localized peritonitis, and gangrene, without abscess
- K35.33Acute appendicitis with perforation, localized peritonitis, and gangrene, with abscess
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