K35.80
✓ BillableUnspecified acute appendicitis
Diseases of the digestive system (K00-K95)
Also Known As
Clinical Description
ICD-10-CM code K35.80 represents unspecified acute appendicitis. This code falls under the Diseases of the digestive system (K00-K95) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.
This is a 6-character code at the 5th level of specificity. This is the most specific code available in this subcategory.
Frequently Asked Questions
What is ICD-10 code K35.80?
ICD-10-CM code K35.80 is "Unspecified acute appendicitis". It belongs to the category: Diseases of the digestive system (K00-K95).
Is K35.80 a billable ICD-10 code?
Yes, K35.80 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Related Codes in K35.8
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)