ICD-10 Code K40.91 – Unilateral inguinal hernia, without obstruction or gangrene, recurrent (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K40.91 – Unilateral inguinal hernia, without obstruction or gangrene, recurrent
What it is
This code identifies a recurrent hernia in one groin area that contains protruding abdominal contents. It is used when there is no bowel obstruction and no gangrene.
Clinical signs
Typical findings include a groin bulge that may increase with coughing, standing, or straining. Clinical features vary; refer to documentation for laterality and whether the hernia is reducible.
When to use this code
Use K40.91 when the record clearly states a unilateral inguinal hernia and notes that it has recurred after prior repair or previous presence. The documentation must also show no obstruction and no gangrene. If laterality is not specified, check documentation before coding.
Do not use for
Do not use this code for inguinal hernias with obstruction or gangrene, or when the hernia is not recurrent. Check documentation if the site is femoral, umbilical, or unspecified.
Coding tip
Confirm recurrence, laterality, and absence of obstruction or gangrene in the operative note, clinic note, or discharge summary before assigning K40.91.