K40: Inguinal hernia
Codes under K40 (Inguinal hernia). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| K40.0 | Bilateral inguinal hernia, with obstruction, without gangrene | — |
| K40.0 | Bilateral inguinal hernia, with obstruction, without gangrene | — |
| K40.00 | Bilateral inguinal hernia, with obstruction, without gangrene, not specified as recurrent | ✓ |
| K40.00 | Bilateral inguinal hernia, with obstruction, without gangrene, not specified as recurrent | ✓ |
| K40.01 | Bilateral inguinal hernia, with obstruction, without gangrene, recurrent | ✓ |
| K40.01 | Bilateral inguinal hernia, with obstruction, without gangrene, recurrent | ✓ |
| K40.1 | Bilateral inguinal hernia, with gangrene | — |
| K40.1 | Bilateral inguinal hernia, with gangrene | — |
| K40.2 | Bilateral inguinal hernia, without obstruction or gangrene | — |
| K40.2 | Bilateral inguinal hernia, without obstruction or gangrene | — |
| K40.3 | Unilateral inguinal hernia, with obstruction, without gangrene | — |
| K40.3 | Unilateral inguinal hernia, with obstruction, without gangrene | — |
| K40.4 | Unilateral inguinal hernia, with gangrene | — |
| K40.4 | Unilateral inguinal hernia, with gangrene | — |
| K40.9 | Unilateral inguinal hernia, without obstruction or gangrene | — |
| K40.9 | Unilateral inguinal hernia, without obstruction or gangrene | — |
| K40.10 | Bilateral inguinal hernia, with gangrene, not specified as recurrent | ✓ |
| K40.10 | Bilateral inguinal hernia, with gangrene, not specified as recurrent | ✓ |
| K40.11 | Bilateral inguinal hernia, with gangrene, recurrent | ✓ |
| K40.11 | Bilateral inguinal hernia, with gangrene, recurrent | ✓ |
| K40.20 | Bilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent | ✓ |
| K40.20 | Bilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent | ✓ |
| K40.21 | Bilateral inguinal hernia, without obstruction or gangrene, recurrent | ✓ |
| K40.21 | Bilateral inguinal hernia, without obstruction or gangrene, recurrent | ✓ |
| K40.30 | Unilateral inguinal hernia, with obstruction, without gangrene, not specified as recurrent | ✓ |
| K40.30 | Unilateral inguinal hernia, with obstruction, without gangrene, not specified as recurrent | ✓ |
| K40.31 | Unilateral inguinal hernia, with obstruction, without gangrene, recurrent | ✓ |
| K40.31 | Unilateral inguinal hernia, with obstruction, without gangrene, recurrent | ✓ |
| K40.40 | Unilateral inguinal hernia, with gangrene, not specified as recurrent | ✓ |
| K40.40 | Unilateral inguinal hernia, with gangrene, not specified as recurrent | ✓ |
| K40.41 | Unilateral inguinal hernia, with gangrene, recurrent | ✓ |
| K40.41 | Unilateral inguinal hernia, with gangrene, recurrent | ✓ |
| K40.90 | Unilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent | ✓ |
| K40.90 | Unilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent | ✓ |
| K40.91 | Unilateral inguinal hernia, without obstruction or gangrene, recurrent | ✓ |
| K40.91 | Unilateral inguinal hernia, without obstruction or gangrene, recurrent | ✓ |
Frequently asked questions
What is ICD-10-CM code K40?
K40 is an ICD-10-CM category covering Inguinal hernia. It contains 36 more specific diagnosis codes, 24 of which are billable.
Is K40 a billable code?
No — K40 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example K40.0 — Bilateral inguinal hernia, with obstruction, without gangrene). 24 of the 36 codes under K40 are billable.
What codes fall under K40?
K40 includes K40.0, K40.0, K40.00, K40.00, K40.01, plus 31 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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