K35.8
Non-billableOther and unspecified acute appendicitis
K35.8 is the ICD-10-CM code for Other and unspecified acute appendicitis. It is a non-billable category code — use a more specific child code such as K35.80 for billing.
K00-K95 Diseases of the digestive system
What this means — in plain language
MedlinePlus · NIHThe appendix is a small, tube-like organ attached to the first part of the large intestine. It is located in the lower right part of the abdomen. It has no known function. A blockage inside of the appendix causes appendicitis. The blockage leads to increased pressure, problems with blood flow, and inflammation. If the blockage is not treated, the appendix can burst and spread infection into the abdomen. This causes…
Read more about Appendicitis at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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