K40.90 — Unilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent

K40.90

ICD-10 Chapter 11: Digestive System — illustrative image — Chapter 11: Diseases of the digestive system (K00–K95) — illustrative image

What this code means

A one-sided inguinal hernia: tissue pushes through a weak spot in the groin; here without obstruction or gangrene, recurrence not specified.

Also called: inguinal hernia.

When this code is used

Used for unilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent.

Where it sits in ICD-10-CM

Code K40.90 belongs to Chapter 11: Diseases of the digestive system, which covers codes K00–K95 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Learn more about this condition

Condition guide: Hernia

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Frequently asked questions

What is ICD-10-CM code K40.90?

K40.90 is the ICD-10-CM diagnosis code for “Unilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent”. A one-sided inguinal hernia: tissue pushes through a weak spot in the groin; here without obstruction or gangrene, recurrence not specified.

When is code K40.90 used?

Used for unilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent. It belongs to Chapter 11 of ICD-10-CM (Diseases of the digestive system).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.