ICD-10-CM > K00-K95 > K65-K68 > K66 K66 Other disorders of peritoneum Non-Billable/Non-Specific Type 2 Excludes ascites (R18.-)peritoneal effusion (chronic) (R18.8) Codes K66.0Peritoneal adhesions (postprocedural) (postinfection)K66.1HemoperitoneumK66.8Other specified disorders of peritoneumK66.9Disorder of peritoneum, unspecified