ICD-10 Code K40.9 – Unilateral inguinal hernia, without obstruction or gangrene (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K40.9 – Unilateral inguinal hernia, without obstruction or gangrene
What it is
This code identifies a one-sided inguinal hernia that is present without bowel blockage or tissue death. Use it when the record documents an inguinal hernia on either the left or right side, but not complications.
Clinical signs
Typical findings include a groin bulge that may become more noticeable with coughing, lifting, or standing. Clinical features vary; refer to documentation for laterality and whether the hernia is reducible or uncomplicated.
When to use this code
Use K40.9 when the provider documents a unilateral inguinal hernia and does not specify left or right, or when the record confirms a one-sided inguinal hernia without obstruction or gangrene. It also fits uncomplicated cases managed conservatively or evaluated without emergent complications.
Do not use for
Do not use this code if the hernia is bilateral, or if the documentation shows obstruction or gangrene. Check documentation if the site is not clearly inguinal or if laterality is specified elsewhere.
Coding tip
Confirm the note states “unilateral inguinal hernia” and that no obstruction or gangrene is documented before assigning K40.9.