K20-K31

Non-Billable
ChapterK00–K95
Rankblock
Official Description

Diseases of esophagus, stomach and duodenum (K20-K31)

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 11: Diseases of the Digestive System (K00-K95).

CH11 Parent Instructions

Excludes2(Not included here)
  • 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)

Instructional Notes

Excludes2(Not included here)
  • hiatus hernia (K44.-)

Clinical Hierarchy

CH11Diseases of the digestive system (K00-K95)
K20-K31Diseases of esophagus, stomach and duodenum (K20-K31)
K20Esophagitis
K21Gastro-esophageal reflux disease
K22Other diseases of esophagus
K23Disorders of esophagus in diseases classified elsewhere
K25Gastric ulcer
K26Duodenal ulcer
K27Peptic ulcer, site unspecified
K28Gastrojejunal ulcer
K29Gastritis and duodenitis
K30Functional dyspepsia
K31Other diseases of stomach and duodenum

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to K20-K31:

chapterCH11
Diseases of the digestive system (K00-K95)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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