ICD-10 Code K59.81 – Ogilvie syndrome (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K59.81 – Ogilvie syndrome
What it is
K59.81 identifies Ogilvie syndrome, also called acute colonic pseudo-obstruction. Use it when the colon is markedly dilated without a mechanical blockage.
Clinical signs
Typical findings include abdominal distension, pain, constipation, and decreased bowel sounds. Clinical features vary; refer to documentation.
When to use this code
Use K59.81 when the record specifically documents Ogilvie syndrome or acute colonic pseudo-obstruction. It fits cases where imaging or clinical assessment supports colonic dilation without an obstructing lesion. If the provider describes only nonspecific constipation or ileus, check documentation before assigning this code.
Do not use for
Do not use this code for mechanical bowel obstruction or uncomplicated constipation. If the chart does not clearly state pseudo-obstruction, check documentation.
Coding tip
Code only when the provider links the diagnosis to colonic pseudo-obstruction, not just abdominal distension.