K56.3 Gallstone ileus

Name of the Condition

• Common name: Gallstone ileus
• Medical term: Gallstone ileus
• ICD Code: K56.3

Summary

Gallstone ileus is a rare form of intestinal obstruction caused by a gallstone that has migrated from the gallbladder into the intestinal tract, typically through a fistula. This blockage disrupts the normal passage of intestinal contents, leading to symptoms such as abdominal pain, vomiting, and distension. It is a mechanical obstruction that requires prompt evaluation and intervention.

Causes

Gallstone ileus occurs when a gallstone erodes through the gallbladder wall into adjacent structures, most commonly the duodenum, forming a fistula. The stone then passes into the small intestine, where it can become lodged and cause obstruction. This process is often associated with chronic gallbladder disease or prior inflammation.

Risk Factors

• Chronic gallbladder disease (e.g., cholecystitis)
• Advanced age (more common in older adults)
• Female gender (slightly higher prevalence)
• History of gallstones
• Prior abdominal surgery or inflammation

Symptoms

• Abdominal pain or cramping
• Nausea or vomiting (may be bilious)
• Abdominal distension
• Inability to pass gas or stool
• Fever or chills (if infection is present)
• Dehydration or weakness

Diagnosis

Diagnosis of gallstone ileus typically involves imaging studies, such as abdominal X-rays, CT scans, or ultrasound, to identify the obstructing stone and any associated fistula. Clinical evaluation may include assessing for signs of intestinal obstruction, and laboratory tests may be used to check for infection or electrolyte imbalances.

Treatment Options

Treatment often requires surgical intervention to remove the obstructing stone and repair the fistula. In some cases, endoscopic or minimally invasive procedures may be used to extract the stone. Supportive care, including fluid replacement and pain management, is also provided.

Prognosis and Follow-Up

Prognosis depends on the severity of the obstruction and the patient's overall health. Early intervention generally improves outcomes. Follow-up care may include monitoring for complications and addressing underlying gallbladder disease to prevent recurrence.

Complications

• Bowel perforation or necrosis
• Sepsis or infection
• Electrolyte imbalances
• Recurrent gallstone-related issues

Lifestyle & Prevention

Preventive measures focus on managing gallbladder health, such as maintaining a healthy weight and diet. For those with a history of gallstones, regular medical evaluation may help detect issues early.

When to Seek Professional Help

Seek immediate medical attention if experiencing severe abdominal pain, persistent vomiting, or inability to pass gas or stool, as these may indicate a serious obstruction.

Tips for Medical Coders

When coding for gallstone ileus (K56.3), ensure documentation supports the diagnosis, including evidence of a migrated gallstone causing intestinal obstruction. Note any associated complications or procedures, as these may require additional codes. Verify that the code aligns with the clinical scenario and documentation.