K40.31
Unilateral inguinal hernia, with obstruction, without gangrene, recurrent
Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 8 never code together
K00-K95chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 15
K40.3code
Inclusion terms
- Inguinal hernia (unilateral) causing obstruction without gangrene
- Incarcerated inguinal hernia (unilateral) without gangrene
- Irreducible inguinal hernia (unilateral) without gangrene
- Strangulated inguinal hernia (unilateral) without gangrene
K40code
Includes
- bubonocele
- direct inguinal hernia
- double inguinal hernia
- indirect inguinal hernia
- inguinal hernia NOS
- oblique inguinal hernia
- scrotal hernia
K40-K46block
Notes
- Hernia with both gangrene and obstruction is classified to hernia with gangrene.
Includes
- acquired hernia
- congenital [except diaphragmatic or hiatus] hernia
- recurrent hernia
Index entries leading here 1
Alongside this code 1 same parent — K40.3
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.