Q40.1 Congenital hiatus hernia

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

Applicable to

• Congenital displacement of cardia through esophageal hiatus

Excludes1 (never code together)

• congenital diaphragmatic hernia (Q79.0)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 750.6 Congenital hiatus hernia

Code annotations containing back-references to Q40.1

Back-references to Q40.1

• Type 1 Excludes: K44 Diaphragmatic hernia ("congenital hiatus hernia (Q40.1)")
• Type 2 Excludes: Q45 Other congenital malformations of digestive system ("congenital hiatus hernia (Q40.1)")
• Type 1 Excludes: Q79.0 Congenital diaphragmatic hernia ("congenital hiatus hernia (Q40.1)")

Diagnosis Index entries for Q40.1

• Displacement, displaced › cardia through esophageal hiatus (congenital)
• Hernia, hernial (acquired) (recurrent) › hiatal (esophageal) (sliding) › congenital
• Hernia, hernial (acquired) (recurrent) › paraesophageal › congenital

Nearby codes

• Q40 Other congenital malformations of upper alimentary tract
• Q40.0 Congenital hypertrophic pyloric stenosis
• Q40.1 Congenital hiatus hernia (this code)
• Q40.2 Other specified congenital malformations of stomach
• Q40.3 Congenital malformation of stomach, unspecified
• Q40.8 Other specified congenital malformations of upper alimentary tract
• Q40.9 Congenital malformation of upper alimentary tract, unspecified