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K40.9 ICD-10-CA code: Unilateral or unspecified inguinal hernia, without obstruction or gangrene

K40.9 is the ICD-10-CA code for “Unilateral or unspecified inguinal hernia, without obstruction or gangrene” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

K40.9

Unilateral or unspecified inguinal hernia, without obstruction or gangrene

Short description: Unil/unspec ing hernia wo obs or gangr

ICD-10-CA · Canada · Also written K409

Index terms

Entries in CIHI’s alphabetical index that lead to K40.9. Searching the index by the condition the note names is how coders reach this code.

  • Hernia, hernial (acquired) (recurrent), sliding (inguinal)
  • Hernia, hernial (acquired) (recurrent), inguinal (direct) (external) (funicular) (indirect) (internal) (oblique) (scrotal) (sliding)
  • Hernia, hernial (acquired) (recurrent), inguinal (direct) (external) (funicular) (indirect) (internal) (oblique) (scrotal) (sliding), unilateral

Notes for K40.9

As CIHI prints them, with any note K40.9 takes from the headings above it.

Includes

  • Inguinal hernia (unilateral) NOS
  • Bubonoceleinguinal hernia:• NOS• direct• double• indirect• obliquescrotal herniaFrom K40 Inguinal hernia
  • Hernia:• acquired• congenital [except diaphragmatic or hiatus]• recurrentFrom K40-K46 Hernia

Excludes

Conditions classified elsewhere.

  • Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 11: Diseases of the digestive system (K00-K93)

Note

  • Hernia with both gangrene and obstruction is classified to hernia with gangrene.From K40-K46 Hernia

Where K40.9 sits

  1. 1ChapterChapter 11: Diseases of the digestive system (K00-K93)
  2. 2Block K40-K46Hernia
  3. 3Category K40Inguinal hernia
  4. 4Valid code K40.9Unilateral or unspecified inguinal hernia, without obstruction or gangrene

Source and release

Data release
ICD-10-CA · FY 2026–2027
Effective date
Apr 1, 2026
Publisher
CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See K40.9 in the CIHI source

Frequently asked questions

What does ICD-10-CA code K40.9 mean?

K40.9 is the ICD-10-CA code for “Unilateral or unspecified inguinal hernia, without obstruction or gangrene” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is K40.9 in ICD-10-CA?

K40.9 sits under K40 Inguinal hernia, within K40-K46 Hernia, within Chapter 11: Diseases of the digestive system (K00-K93).

What coding notes apply to K40.9?

ICD-10-CA lists Includes, Note, Excludes notes for K40.9, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

Codes beside K40.9

K40.0Bilateral inguinal hernia, with obstruction, without gangreneK40.1Bilateral inguinal hernia, with gangreneK40.2Bilateral inguinal hernia, without obstruction or gangreneK40.3Unilateral or unspecified inguinal hernia, with obstruction, without gangreneK40.4Unilateral or unspecified inguinal hernia, with gangrene