ICD-10 Diagnosis Code K66

Other disorders of peritoneum

Diagnosis Code K66

ICD-10: K66
Short Description: Other disorders of peritoneum
Long Description: Other disorders of peritoneum
This is the 2018 version of the ICD-10-CM diagnosis code K66

Not Valid for Submission
The code K66 is a "header" and not valid for submission for HIPAA-covered transactions.

Code Classification
  • Diseases of the digestive system (K00–K93)
    • Diseases of peritoneum and retroperitoneum (K65-K68)
      • Other disorders of peritoneum (K66)

Information for Patients


Peritoneal Disorders

Your peritoneum is the tissue that lines your abdominal wall and covers most of the organs in your abdomen. A liquid, peritoneal fluid, lubricates the surface of this tissue.

Disorders of the peritoneum are not common. They include

  • Peritonitis - an inflammation of the peritoneum
  • Cancer
  • Complications from peritoneal dialysis

Your doctor may use imaging tests or lab tests to analyze the peritoneal fluid to diagnose the problem. Treatment of peritoneal disorders depends on the cause.

  • Peritonitis (Medical Encyclopedia)
  • Peritonitis - secondary (Medical Encyclopedia)
  • Peritonitis - spontaneous (Medical Encyclopedia)
  • Retroperitoneal inflammation (Medical Encyclopedia)


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