K31.3 Pylorospasm, not elsewhere classified

Billable ICD-10-CM code, FY2026.

Excludes1 (never code together)

• congenital or infantile pylorospasm (Q40.0)
• neurotic pylorospasm (F45.8)
• psychogenic pylorospasm (F45.8)

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)

• 537.81 Pylorospasm

Code annotations containing back-references to K31.3

Back-references to K31

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

Diagnosis Index entries for K31.3

• Obstruction, obstructed, obstructive › stomach NEC › due to pylorospasm
• Pylorospasm (reflex) NEC
• Spasm (s), spastic, spasticity › pylorus NEC

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
• K31.3 Pylorospasm, not elsewhere classified (this code)
• K31.4 Gastric diverticulum
• K31.5 Obstruction of duodenum
• K31.6 Fistula of stomach and duodenum
• K31.7 Polyp of stomach and duodenum
• K31.8 Other specified diseases of stomach and duodenum