K42.1 Umbilical hernia with gangrene

Billable ICD-10-CM code, FY2026. Acts as a Major Complication or Comorbidity (MCC) as a secondary diagnosis.

Applicable to

• Gangrenous umbilical hernia

Applies from K42 Umbilical hernia

Includes

• paraumbilical hernia

Excludes1 (never code together)

• omphalocele (Q79.2)

MS-DRG index

Defines the logic of DRG(s) 393-395 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 551.1 Umbilical hernia with gangrene

Code annotations containing back-references to K42.1

Back-references to K42.1

• Type 1 Excludes: I96 Gangrene, not elsewhere classified ("gangrene in hernia (K40.1, K40.4, K41.1, K41.4, K42.1, K43.1-, K44.1, K45.1, K46.1)")

Back-references to K42

• Type 2 Excludes: K56.7 Ileus, unspecified ("intestinal obstruction with hernia (K40-K46)")
• Type 1 Excludes: Q79.2 Exomphalos ("umbilical hernia (K42.-)")
• Type 1 Excludes: Q79.5 Other congenital malformations of abdominal wall ("umbilical hernia (K42.-)")

Diagnosis Index entries for K42.1

• Hernia, hernial (acquired) (recurrent) › umbilicus, umbilical › with › gangrene (and obstruction)
• Incarceration, incarcerated › exomphalos › gangrenous
• Incarceration, incarcerated › sarcoepiplomphalocele › with gangrene

Nearby codes

• K42 Umbilical hernia
• K42.0 Umbilical hernia with obstruction, without gangrene
• K42.1 Umbilical hernia with gangrene (this code)
• K42.9 Umbilical hernia without obstruction or gangrene