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K35.209

✓ Billable

Acute appendicitis with generalized peritonitis, without abscess, unspecified as to perforation

Diseases of the digestive system (K00-K95)

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Also Known As

(Acute) appendicitis with generalized peritonitis NOS
✅ No additional coding notes for K35.209

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Code Information

CodeK35.209
BillableYes
ParentK35.20
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)