K63.82: Colonic Pseudoobstruction
K63.82 is the ICD-10-CM diagnosis code for colonic pseudoobstruction, a condition characterized by massive dilation of the colon without mechanical obstruction.
Clinical Definition
Colonic pseudoobstruction (also known as Ogilvie's syndrome when acute) represents functional obstruction of the colon where the bowel becomes massively dilated despite the absence of any physical blockage 1
This code falls under the broader category K63 ("Other diseases of intestine"), which encompasses various non-inflammatory, non-neoplastic intestinal disorders 2
Key Distinguishing Features
The diagnosis requires demonstrating colonic dilation without mechanical obstruction on imaging studies such as abdominal X-ray or CT scan, typically showing cecal diameter >9-12 cm 1
The condition must be differentiated from true mechanical obstruction (which would use different ICD-10 codes in the K56 series for intestinal obstruction) through imaging and/or endoscopic evaluation 2
Clinical Context and Risk Factors
Colonic pseudoobstruction commonly occurs in hospitalized patients with serious underlying conditions including recent surgery, trauma, severe infections, metabolic derangements (particularly electrolyte abnormalities), or neurologic disorders 1
The condition carries significant morbidity risk, particularly cecal perforation when diameter exceeds 12 cm, which dramatically increases mortality 2
Documentation Requirements
Proper use of K63.82 requires clinical documentation of colonic dilation confirmed by imaging, absence of mechanical obstruction, and typically notation of the underlying precipitating condition 1
The code may be used for both acute presentations (Ogilvie's syndrome) and chronic intestinal pseudoobstruction affecting the colon 2