ICD-10-CM category
K40 Inguinal hernia
K40 is a category, not a billable code. Report one of the 12 complete codes below.
Codes in K40
- K40.00Bilateral inguinal hernia, with obstruction, without gangrene, not specified as recurrent
- K40.01Bilateral inguinal hernia, with obstruction, without gangrene, recurrent
- K40.10Bilateral inguinal hernia, with gangrene, not specified as recurrent
- K40.11Bilateral inguinal hernia, with gangrene, recurrent
- K40.20Bilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent
- K40.21Bilateral inguinal hernia, without obstruction or gangrene, recurrent
- K40.30Unilateral inguinal hernia, with obstruction, without gangrene, not specified as recurrent
- K40.31Unilateral inguinal hernia, with obstruction, without gangrene, recurrent
- K40.40Unilateral inguinal hernia, with gangrene, not specified as recurrent
- K40.41Unilateral inguinal hernia, with gangrene, recurrent
- K40.90Unilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent
- K40.91Unilateral inguinal hernia, without obstruction or gangrene, recurrent
Outside the US? K40 in the international WHO ICD-10 lists its inclusion and exclusion notes.
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ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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