K31.B – Hypertrophic pyloric stenosis, in childhood
ICD-10-CM 2027 diagnosis code · Diseases of esophagus, stomach and duodenum
ICD-10-CM code
K31.B
- Code
K31.B(claims format:K31B)- Description
- Hypertrophic pyloric stenosis, in childhood
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 11. Diseases of the digestive system (K00-K95)
- Block
- K20-K31 Diseases of esophagus, stomach and duodenum
- Parent codes
- K31
Notes for K31.B
Applicable to:
- Infantile hypertrophic pyloric stenosis
- Pediatric hypertrophic pyloric stenosis
- Pediatric pyloric stenosis
Excludes1 (not coded here):
- congenital pyloric stenosis (Q40.0)
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
K31 – Other diseases of stomach and duodenum
Includes:
- functional disorders of stomach
Excludes2 (not included here):
Block K20-K31
Excludes2 (not included here):
- hiatus hernia (K44.-)
Index terms for K31.B
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in K31
- K31.0 – Acute dilatation of stomachBillable
- K31.1 – Adult hypertrophic pyloric stenosisBillable
- K31.2 – Hourglass stricture and stenosis of stomachBillable
- K31.3 – Pylorospasm, not elsewhere classifiedBillable
- K31.4 – Gastric diverticulumBillable
- K31.5 – Obstruction of duodenumBillable
- K31.6 – Fistula of stomach and duodenumBillable
- K31.7 – Polyp of stomach and duodenumBillable
- K31.8 – Other specified diseases of stomach and duodenumHeader
- K31.9 – Disease of stomach and duodenum, unspecifiedBillable
- K31.A – Gastric intestinal metaplasiaHeader
Frequently asked questions
What is ICD-10 code K31.B?
K31.B is the ICD-10-CM code for hypertrophic pyloric stenosis, in childhood, in the block K20-K31 (Diseases of esophagus, stomach and duodenum).
Is K31.B a billable code?
Yes. K31.B is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does K31.B belong to?
It belongs to category K31 – Other diseases of stomach and duodenum.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.