ICD-10 code for inguinal hernia

The ICD-10-CM code for inguinal hernia is K40.90 (Unilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent). The official index lists 26 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on K40.90.

Within K40.9 (unilateral inguinal hernia, without obstruction or gangrene), K40.90 is specifically for unilateral inguinal hernia, without obstruction or gangrene, not specified as recurrent. Related codes cover recurrent (K40.91).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 393 (Other Digestive System Diagnoses with MCC, relative weight 1.5881), DRG 394 (Other Digestive System Diagnoses with CC, relative weight 0.9228) and DRG 395 (Other Digestive System Diagnoses without CC/MCC, relative weight 0.6382), in MDC 06 (Diseases and Disorders of the Digestive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.