K35.2
⚠ Non-billable (Header)Acute appendicitis with generalized peritonitis
Diseases of the digestive system (K00-K95)
⚠️ This is a category header code — not billable. Use a more specific child code below.
Child Codes (2)
Clinical Description
ICD-10-CM code K35.2 represents acute appendicitis with generalized peritonitis. This code falls under the Diseases of the digestive system (K00-K95) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.
This is a 5-character code at the 4th level of specificity. There are 2 more specific child codes under K35.2.
Frequently Asked Questions
What is ICD-10 code K35.2?
ICD-10-CM code K35.2 is "Acute appendicitis with generalized peritonitis". It belongs to the category: Diseases of the digestive system (K00-K95).
Is K35.2 a billable ICD-10 code?
No, K35.2 is a non-billable header code. A more specific child code must be used for billing.
Related Codes in K35
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)