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K35.80 Unspecified acute appendicitis
BackK35Acute appendicitisCategory3 →K35.2Acute appendicitis with generalized peritonitisCategory2 →K35.20Acute appendicitis with generalized peritonitis, without abscessCategory3 →K35.200Acute appendicitis with generalized peritonitis, without perforation or abscessCategoryK35.201Acute appendicitis with generalized peritonitis, with perforation, without abscessCategoryK35.209Acute appendicitis with generalized peritonitis, without abscess, unspecified as to perforationCategoryK35.21Acute appendicitis with generalized peritonitis, with abscessCategory3 →K35.210Acute appendicitis with generalized peritonitis, without perforation, with abscessCategoryK35.211Acute appendicitis with generalized peritonitis, with perforation and abscessCategoryK35.219Acute appendicitis with generalized peritonitis, with abscess, unspecified as to perforationCategoryK35.3Acute appendicitis with localized peritonitisCategory4 →K35.30Acute appendicitis with localized peritonitis, without perforation or gangreneCategoryK35.31Acute appendicitis with localized peritonitis and gangrene, without perforationCategoryK35.32Acute appendicitis with perforation, localized peritonitis, and gangrene, without abscessCategoryK35.33Acute appendicitis with perforation, localized peritonitis, and gangrene, with abscessCategoryK35.8Other and unspecified acute appendicitisCategory2 →K35.80Unspecified acute appendicitisCategoryK35.89Other acute appendicitisCategory2 →K35.890Other acute appendicitis without perforation or gangreneCategoryK35.891Other acute appendicitis without perforation, with gangreneCategory
CategoryCODABLE
K35.80
Unspecified acute appendicitis
EXAMPLES
Acute appendicitis NOS
Acute appendicitis without (localized) (generalized) peritonitis
Acute appendicitis without (localized) (generalized) peritonitis
- Chapter
- XI · Diseases of the digestive system
- Section
- K35-K38
- Valid from
Source
CMS ICD-10-CM Tabular List, edition FY2026.