All ICD10 Codes

K31

Non-Billable
ChapterK00–K95
Rankcategory
Official Description

Other diseases of stomach and duodenum

Use a more specific code (9 billable, 2 non-billable)
K31.0Acute dilatation of stomachK31.1Adult hypertrophic pyloric stenosisK31.2Hourglass stricture and stenosis of stomachK31.3Pylorospasm, not elsewhere classifiedK31.4Gastric diverticulumK31.5Obstruction of duodenumK31.6Fistula of stomach and duodenumK31.7Polyp of stomach and duodenumK31.8Other specified diseases of stomach and duodenumhas subcodesK31.9Disease of stomach and duodenum, unspecifiedK31.AGastric intestinal metaplasiahas subcodes
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 11: Diseases of the Digestive System (K00-K95).

CH11 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

K20-K31 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • hiatus hernia (K44.-)

Instructional Notes

Includes
  • functional disorders of stomach
Excludes2(Not included here. Code separately if applicable.)

Clinical Hierarchy

BillableHas subcodes
CH11Diseases of the digestive system (K00-K95)
K20-K31Diseases of esophagus, stomach and duodenum (K20-K31)
K31Other diseases of stomach and duodenumNot billable
K31.0Acute dilatation of stomachBillable
K31.1Adult hypertrophic pyloric stenosisBillable
K31.2Hourglass stricture and stenosis of stomachBillable
K31.3Pylorospasm, not elsewhere classifiedBillable
K31.4Gastric diverticulumBillable
K31.5Obstruction of duodenumBillable
K31.6Fistula of stomach and duodenumBillable
K31.7Polyp of stomach and duodenumBillable
K31.8Other specified diseases of stomach and duodenumSubcodes
K31.9Disease of stomach and duodenum, unspecifiedBillable
K31.AGastric intestinal metaplasiaSubcodes

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to K31:

blockK20-K31
Diseases of esophagus, stomach and duodenum (K20-K31)
View context instructions
chapterCH11
Diseases of the digestive system (K00-K95)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Other diseases of stomach and duodenum.

Search PCS Codes