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K66

⚠ Non-billable (Header)

Other disorders of peritoneum

Diseases of the digestive system (K00-K95)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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⚠️ Excludes2

direct

May be coded together if both conditions coexist

  • • ascites (R18.-)
  • • peritoneal effusion (chronic) (R18.8)

Child Codes (4)

K66.0Peritoneal adhesions (postprocedural) (postinfection)K66.1HemoperitoneumK66.8Other specified disorders of peritoneumK66.9Disorder of peritoneum, unspecified

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Code Information

CodeK66
BillableNo — Header code
CategoryDiseases of the digestive system (K00-K95)
Excludes10 rule(s)
Excludes22 note(s)
Child codes4

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)