K40-K46Not billable, use a more specific code below
Hernia (K40-K46)
chapter 11: Diseases of the Digestive System
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Instructional notes
Includes: conditions that are coded here
- acquired hernia
- congenital [except diaphragmatic or hiatus] hernia
- recurrent hernia
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
There are no chapter-specific rules for Chapter 11 yet, so the general rules in Section I.B apply.
All codes under K40-K46
K40-K46 can't be used on a claim. Pick a billable code below; grey headings group them.
- K40Inguinal hernia
- K40.0Bilateral inguinal hernia, with obstruction, without gangrene
- K40.00Bilateral inguinal hernia, with obstruction, without gangrene, not specified as recurrent
- K40.01Bilateral inguinal hernia, with obstruction, without gangrene, recurrent
- K40.1Bilateral inguinal hernia, with gangrene
- K40.10Bilateral inguinal hernia, with gangrene, not specified as recurrent
- K40.11Bilateral inguinal hernia, with gangrene, recurrent
- K40.2Bilateral inguinal hernia, without obstruction or gangrene
- K40.20Bilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent
- K40.21Bilateral inguinal hernia, without obstruction or gangrene, recurrent
- K40.3Unilateral inguinal hernia, with obstruction, without gangrene
- K40.30Unilateral inguinal hernia, with obstruction, without gangrene, not specified as recurrent
- K40.31Unilateral inguinal hernia, with obstruction, without gangrene, recurrent
- K40.4Unilateral inguinal hernia, with gangrene
- K40.40Unilateral inguinal hernia, with gangrene, not specified as recurrent
- K40.41Unilateral inguinal hernia, with gangrene, recurrent
- K40.9Unilateral inguinal hernia, without obstruction or gangrene
- K40.90Unilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent
- K40.91Unilateral inguinal hernia, without obstruction or gangrene, recurrent
- K41Femoral hernia
- K41.0Bilateral femoral hernia, with obstruction, without gangrene
- K41.00Bilateral femoral hernia, with obstruction, without gangrene, not specified as recurrent
- K41.01Bilateral femoral hernia, with obstruction, without gangrene, recurrent
- K41.1Bilateral femoral hernia, with gangrene
- K41.10Bilateral femoral hernia, with gangrene, not specified as recurrent
- K41.11Bilateral femoral hernia, with gangrene, recurrent
- K41.2Bilateral femoral hernia, without obstruction or gangrene
- K41.20Bilateral femoral hernia, without obstruction or gangrene, not specified as recurrent
- K41.21Bilateral femoral hernia, without obstruction or gangrene, recurrent
- K41.3Unilateral femoral hernia, with obstruction, without gangrene
- K41.30Unilateral femoral hernia, with obstruction, without gangrene, not specified as recurrent
- K41.31Unilateral femoral hernia, with obstruction, without gangrene, recurrent
- K41.4Unilateral femoral hernia, with gangrene
- K41.40Unilateral femoral hernia, with gangrene, not specified as recurrent
- K41.41Unilateral femoral hernia, with gangrene, recurrent
- K41.9Unilateral femoral hernia, without obstruction or gangrene
- K41.90Unilateral femoral hernia, without obstruction or gangrene, not specified as recurrent
- K41.91Unilateral femoral hernia, without obstruction or gangrene, recurrent
- K42Umbilical hernia
- K42.0Umbilical hernia with obstruction, without gangrene
- K42.1Umbilical hernia with gangrene
- K42.9Umbilical hernia without obstruction or gangrene
- K43Ventral hernia
- K43.0Incisional hernia with obstruction, without gangrene
- K43.1Incisional hernia with gangrene
- K43.2Incisional hernia without obstruction or gangrene
- K43.3Parastomal hernia with obstruction, without gangrene
- K43.4Parastomal hernia with gangrene
- K43.5Parastomal hernia without obstruction or gangrene
- K43.6Other and unspecified ventral hernia with obstruction, without gangrene
- K43.7Other and unspecified ventral hernia with gangrene
- K43.9Ventral hernia without obstruction or gangrene
- K44Diaphragmatic hernia
- K44.0Diaphragmatic hernia with obstruction, without gangrene
- K44.1Diaphragmatic hernia with gangrene
- K44.9Diaphragmatic hernia without obstruction or gangrene
- K45Other abdominal hernia
- K45.0Other specified abdominal hernia with obstruction, without gangrene
- K45.1Other specified abdominal hernia with gangrene
- K45.8Other specified abdominal hernia without obstruction or gangrene
- K46Unspecified abdominal hernia
- K46.0Unspecified abdominal hernia with obstruction, without gangrene
- K46.1Unspecified abdominal hernia with gangrene
- K46.9Unspecified abdominal hernia without obstruction or gangrene
K40-K46 MS-DRGs
This code does not group to an MS-DRG as a principal diagnosis.
Other codes that refer to K40-K46
Notes on these codes point to K40-K46.
- K56.7 Excludes2: intestinal obstruction with hernia (K40-K46)
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Hernia
A hernia happens when part of an internal organ or tissue bulges through a weak area of muscle. Most hernias are in the abdomen. There are several types of hernias, including:
Read more about hernia on MedlinePlus