ICD-10 Code K42.0 – Umbilical hernia with obstruction, without gangrene (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K42.0 – Umbilical hernia with obstruction, without gangrene
What it is
K42.0 identifies an umbilical hernia that is blocked, meaning abdominal contents are trapped at the navel. The hernia is obstructed but there is no gangrene or tissue death.
Clinical signs
Typical findings include a painful or tender umbilical bulge, swelling that may not reduce, and symptoms of bowel obstruction. Clinical features vary; refer to documentation.
When to use this code
Use K42.0 when the provider documents an umbilical hernia with obstruction and specifically states there is no gangrene. It also fits cases where the hernia is incarcerated or causing obstructive symptoms, but tissue remains viable. Check documentation if the note is unclear about obstruction or gangrene.
Do not use for
Do not use this code for an uncomplicated umbilical hernia or for a hernia with gangrene. If the record does not confirm obstruction, choose the more specific documented diagnosis.
Coding tip
Look for both obstruction and the absence of gangrene in the provider note before assigning K42.0.