K66 Other disorders of peritoneum

Category / Non-billable header 4 subcodes

Block: Diseases of peritoneum and retroperitoneum (K65-K6A)

Excludes 2 (not included here)

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

Subcodes

Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.

Code Description Billable
K66..0 Peritoneal adhesions (postprocedural) (postinfection) Yes
K66..1 Hemoperitoneum Yes
K66..8 Other specified disorders of peritoneum Yes
K66..9 Disorder of peritoneum, unspecified Yes

Last reviewed: September 2026