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K35.3

Non-billable

Acute appendicitis with localized peritonitis

K35.3 is the ICD-10-CM code for Acute appendicitis with localized peritonitis. It is a non-billable category code — use a more specific child code such as K35.30 for billing.

Status
Header (non-billable)
Chapter
K00-K95
Parent
K35
Subcodes
4
Edition
FY2026

K00-K95 Diseases of the digestive system

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code K35.3?
K35.3 is the ICD-10-CM code for "Acute appendicitis with localized peritonitis". It falls under K00-K95 Diseases of the digestive system.
Is K35.3 a billable code?
No — K35.3 is a non-billable header code. Use a more specific child code (such as K35.30) for billing.
What are the subcodes of K35.3?
K35.3 has 4 more specific child codes, including K35.30, K35.31, K35.32.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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