K31.2 Hourglass stricture and stenosis of stomach

Billable ICD-10-CM code, FY2026.

Excludes1 (never code together)

• congenital hourglass stomach (Q40.2)
• hourglass contraction of stomach (K31.89)

Applies from K31 Other diseases of stomach and duodenum

Includes

• functional disorders of stomach

Excludes2 (not included here)

• diabetic gastroparesis (E08.43, E09.43, E10.43, E11.43, E13.43)
• diverticulum of duodenum (K57.00-K57.13)

MS-DRG index

Defines the logic of DRG(s) 391-392 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 537.6 Hourglass stricture or stenosis of stomach

Code annotations containing back-references to K31.2

Back-references to K31

• Type 2 Excludes: K59 Other functional intestinal disorders ("functional disorders of stomach (K31.-)")

Diagnosis Index entries for K31.2

• Bilocular stomach
• Cascade stomach
• Deformity › cascade, stomach
• Hourglass (contracture) › stomach › stricture
• Stenosis, stenotic (cicatricial) › stomach, hourglass
• Stricture › hourglass, of stomach
• Stricture › stomach › hourglass

Nearby codes

• K31 Other diseases of stomach and duodenum
• K31.0 Acute dilatation of stomach
• K31.1 Adult hypertrophic pyloric stenosis
• K31.2 Hourglass stricture and stenosis of stomach (this code)
• K31.3 Pylorospasm, not elsewhere classified
• K31.4 Gastric diverticulum
• K31.5 Obstruction of duodenum
• K31.6 Fistula of stomach and duodenum
• K31.7 Polyp of stomach and duodenum