| K40 | Inguinal hernia |
| K400 | Bilateral inguinal hernia, with obstruction, without gangrene |
| K4000 | Bilateral inguinal hernia, with obstruction, without gangrene, not specified as recurrent |
| K4001 | Bilateral inguinal hernia, with obstruction, without gangrene, recurrent |
| K401 | Bilateral inguinal hernia, with gangrene |
| K4010 | Bilateral inguinal hernia, with gangrene, not specified as recurrent |
| K4011 | Bilateral inguinal hernia, with gangrene, recurrent |
| K402 | Bilateral inguinal hernia, without obstruction or gangrene |
| K4020 | Bilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent |
| K4021 | Bilateral inguinal hernia, without obstruction or gangrene, recurrent |
| K403 | Unilateral inguinal hernia, with obstruction, without gangrene |
| K4030 | Unilateral inguinal hernia, with obstruction, without gangrene, not specified as recurrent |
| K4031 | Unilateral inguinal hernia, with obstruction, without gangrene, recurrent |
| K404 | Unilateral inguinal hernia, with gangrene |
| K4040 | Unil inguinal hernia, w gangrene, not specified as recurrent Unilateral inguinal hernia, with gangrene, not specified as recurrent |
| K4041 | Unilateral inguinal hernia, with gangrene, recurrent |
| K409 | Unilateral inguinal hernia, without obstruction or gangrene |
| K4090 | Unilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent |
| K4091 | Unilateral inguinal hernia, without obstruction or gangrene, recurrent |
| K41 | Femoral hernia |
| K410 | Bilateral femoral hernia, with obstruction, without gangrene Bilateral femoral hernia, with obstruction, without gangrene |
| K4100 | Bilateral femoral hernia, with obstruction, without gangrene, not specified as recurrent |
| K4101 | Bilateral femoral hernia, with obstruction, without gangrene, recurrent |
| K411 | Bilateral femoral hernia, with gangrene |
| K4110 | Bilateral femoral hernia, with gangrene, not specified as recurrent |
| K4111 | Bilateral femoral hernia, with gangrene, recurrent |
| K412 | Bilateral femoral hernia, without obstruction or gangrene |
| K4120 | Bilateral femoral hernia, without obstruction or gangrene, not specified as recurrent |
| K4121 | Bilateral femoral hernia, without obstruction or gangrene, recurrent |
| K413 | Unilateral femoral hernia, with obstruction, without gangrene |
| K4130 | Unil femoral hernia, w obst, w/o gangrene, not spcf as recur Unilateral femoral hernia, with obstruction, without gangrene, not specified as recurrent |
| K4131 | Unilateral femoral hernia, with obstruction, without gangrene, recurrent |
| K414 | Unilateral femoral hernia, with gangrene |
| K4140 | Unilateral femoral hernia, with gangrene, not specified as recurrent |
| K4141 | Unilateral femoral hernia, with gangrene, recurrent |
| K419 | Unilateral femoral hernia, without obstruction or gangrene |
| K4190 | Unil femoral hernia, w/o obst or gangrene, not spcf as recur Unilateral femoral hernia, without obstruction or gangrene, not specified as recurrent |
| K4191 | Unilateral femoral hernia, without obstruction or gangrene, recurrent |
| K42 | Umbilical hernia |
| K420 | Umbilical hernia with obstruction, without gangrene |
| K421 | Umbilical hernia with gangrene |
| K429 | Umbilical hernia without obstruction or gangrene |
| K43 | Ventral hernia |
| K430 | Incisional hernia with obstruction, without gangrene |
| K431 | Incisional hernia with gangrene |
| K432 | Incisional hernia without obstruction or gangrene |
| K433 | Parastomal hernia with obstruction, without gangrene |
| K434 | Parastomal hernia with gangrene |
| K435 | Parastomal hernia without obstruction or gangrene |
| K436 | Other and unsp ventral hernia with obstruction, w/o gangrene Other and unspecified ventral hernia with obstruction, without gangrene |