K31.B: Hypertrophic pyloric stenosis, in childhood

New code · FY2027

Billable: use this code on claims.

• New code, effective October 1, 2026 (FY2027). Before that, this condition was coded as Q40.0.

Code breakdown

Coding notes

Inclusion terms

• Infantile hypertrophic pyloric stenosis
• Pediatric hypertrophic pyloric stenosis
• Pediatric pyloric stenosis

Excludes1

• congenital pyloric stenosis (Q40.0)

Includes (from K31)

• functional disorders of stomach

Excludes2 (from K31)

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

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All FY2027 ICD-10-CM changes

ICD-10-CM codes and descriptions are from the CMS and NCHS code files. Coverage is from the CMS Medicare Coverage Database billing and coding articles.