ICD-10 Code K40.90 – Unilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K40.90 – Unilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent
What it is
This code identifies a one-sided inguinal hernia in which abdominal tissue protrudes through the groin area. It applies when there is no obstruction, no gangrene, and the record does not state that the hernia is recurrent.
Clinical signs
Patients may have a groin bulge, discomfort, or pain that worsens with coughing, lifting, or standing. Clinical features vary; refer to documentation, and confirm that no obstruction or gangrene is documented.
When to use this code
Use K40.90 when the provider documents a unilateral inguinal hernia and does not describe bowel obstruction, strangulation, or gangrene. It also fits when the hernia is not documented as recurrent. If laterality is known but recurrence status is unclear, check documentation carefully.
Do not use for
Do not use this code for bilateral inguinal hernias, obstructed hernias, or hernias with gangrene. Also avoid it when the record clearly states the hernia is recurrent or another hernia type is documented.
Coding tip
Verify laterality and recurrence in the note before assigning K40.90; missing details can change the code.