K35.80

✓ Billable

Unspecified acute appendicitis

Diseases of the digestive system (K00-K95)

Also Known As

Acute appendicitis NOSAcute appendicitis without (localized) (generalized) peritonitis

✅ No additional coding notes for K35.80

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Code Information

CodeK35.80

BillableYes

ParentK35.8

CategoryDiseases of the digestive system (K00-K95)

Excludes10 rule(s)

Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)