ICD-10 Diagnosis Code K66.1


Diagnosis Code K66.1

ICD-10: K66.1
Short Description: Hemoperitoneum
Long Description: Hemoperitoneum
This is the 2017 version of the ICD-10-CM diagnosis code K66.1

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

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code K66.1 is grouped in the following Diagnostic Related Group(s) (MS-DRG v33.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Hematoma of abdominal wall
  • Hematoma of extraperitoneal space
  • Hemorrhage into peritoneal cavity
  • Intraperitoneal hematoma
  • Nontraumatic hemoperitoneum
  • Perinephric hematoma
  • Retroperitoneal hematoma
  • Retroperitoneal hemorrhage

Index of Diseases and Injuries
References found for the code K66.1 in the Index of Diseases and Injuries:

Information for Patients

Gastrointestinal Bleeding

Also called: GI bleeding

Your digestive or gastrointestinal (GI) tract includes the esophagus, stomach, small intestine, large intestine or colon, rectum, and anus. Bleeding can come from any of these areas. The amount of bleeding can be so small that only a lab test can find it.

Signs of bleeding in the digestive tract depend where it is and how much bleeding there is.

Signs of bleeding in the upper digestive tract include

  • Bright red blood in vomit
  • Vomit that looks like coffee grounds
  • Black or tarry stool
  • Dark blood mixed with stool

Signs of bleeding in the lower digestive tract include

  • Black or tarry stool
  • Dark blood mixed with stool
  • Stool mixed or coated with bright red blood

GI bleeding is not a disease, but a symptom of a disease. There are many possible causes of GI bleeding, including hemorrhoids, peptic ulcers, tears or inflammation in the esophagus, diverticulosis and diverticulitis, ulcerative colitis and Crohn's disease, colonic polyps, or cancer in the colon, stomach or esophagus.

The test used most often to look for the cause of GI bleeding is called endoscopy. It uses a flexible instrument inserted through the mouth or rectum to view the inside of the GI tract. A type of endoscopy called colonoscopy looks at the large intestine.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

  • Bleeding esophageal varices
  • Bloody or tarry stools
  • Gastrointestinal bleeding
  • Lower GI Series - NIH (National Institute of Diabetes and Digestive and Kidney Diseases)
  • Mallory-Weiss tear
  • Vomiting blood

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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
  • Peritonitis - secondary
  • Peritonitis - spontaneous
  • Retroperitoneal inflammation

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