K66.8 Other specified disorders of peritoneum

Billable ICD-10-CM code, FY2026.

Applies from K66 Other disorders of peritoneum

Excludes2 (not included here)

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

MS-DRG index

Defines the logic of DRG(s) 393-395 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 568.89 Other specified disorders of peritoneum (approximate)

Diagnosis Index entries for K66.8

• Cyst (colloid) (mucous) (simple) (retention) › mesentery, mesenteric
• Cyst (colloid) (mucous) (simple) (retention) › omentum (lesser)
• Cyst (colloid) (mucous) (simple) (retention) › peritoneum
• Disease, diseased › peritoneum › specified NEC
• Frozen › pelvis (female) › male
• Granuloma › abdomen
• Granuloma › peritoneum
• Pneumatosis › peritonei
• Rupture, ruptured › mesentery (nontraumatic)

Nearby codes

• K66 Other disorders of peritoneum
• K66.0 Peritoneal adhesions (postprocedural) (postinfection)
• K66.1 Hemoperitoneum
• K66.8 Other specified disorders of peritoneum (this code)
• K66.9 Disorder of peritoneum, unspecified