ICD-10-CM
ICD-10 code for Appendicitis: K37
The ICD-10-CM index points "Appendicitis" to K37, Unspecified appendicitis. K37 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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Index subterms
A header groups codes and is not billed. A billable code is one you can report.
- K35.80acute (catarrhal) (fulminating) (obstructive) (retrocecal) (suppurative), Unspecified acute appendicitisBillable
- A06.89amebic, Other amebic infectionsBillable
- K36chronic (recurrent), Other appendicitisBillable
- K36healed (obliterative), Other appendicitisBillable
- K36interval, Other appendicitisBillable
- K36neurogenic, Other appendicitisBillable
- K36obstructive, Other appendicitisBillable
- K36recurrent, Other appendicitisBillable
- K36relapsing, Other appendicitisBillable
- K35.32ruptured NOS (with localized peritonitis), Acute appendicitis with perforation, localized peritonitis, and gangrene, without abscessBillable
- K36subacute (adhesive), Other appendicitisBillable
- K36subsiding, Other appendicitisBillable
- A18.32tuberculous, Tuberculous enteritisBillable
Excludes1
Excludes1 means these codes are not reported together.
Related conditions
Related pages
Questions
What is the ICD-10 code for Appendicitis?
The ICD-10-CM index points "Appendicitis" to K37, Unspecified appendicitis. K37 is a billable code.
Is K37 billable?
Yes. K37 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to K37?
The CDC tabular list gives 1 Excludes1 note (not coded together) for K37 and the categories above it. They are listed on this page.
What chapter is K37 in?
Chapter 11. Diseases of the digestive system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.