ICD-10-CM diagnosis code
K40.40 Unilateral inguinal hernia, with gangrene, not specified as recurrent
- Billable
- Yes, a complete code (FY2026)
- Category
- K40 Inguinal hernia
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Other codes in K40
12 complete codes in this category.
- 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
Documentation tips
- Make sure the note supports every element of the title, “Unilateral inguinal hernia, with gangrene, not specified as recurrent”: each detail in it should be traceable to the history, examination or assessment.
- Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
- Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to K40.
The international WHO ICD-10 also has K40, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.
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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