ICD-10 Code K40.21 – Bilateral inguinal hernia, without obstruction or gangrene, recurrent (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K40.21 – Bilateral inguinal hernia, without obstruction or gangrene, recurrent
What it is
K40.21 identifies a recurrent inguinal hernia on both sides of the groin without obstruction or gangrene. Use it when the hernia has returned after prior repair and there is no evidence of trapped bowel or tissue death.
Clinical signs
Typical findings include a groin bulge on both sides, discomfort, or a reducible mass that may increase with coughing or straining. Clinical features vary; refer to documentation.
When to use this code
Use this code when documentation clearly states bilateral inguinal hernias are recurrent and uncomplicated. It fits follow-up or evaluation visits where the provider confirms prior repair and no obstruction or gangrene is present. Check documentation if laterality or recurrence is unclear.
Do not use for
Do not assign K40.21 if the hernia is unilateral, not recurrent, or described with obstruction or gangrene. If the note does not specify bilateral recurrence, check documentation.
Coding tip
Confirm both laterality and recurrence in the record before coding, because missing either detail changes the ICD-10 selection.