All ICD10 Codes

K20-K31

Non-Billable
ChapterK00–K95
Rankblock
Official Description

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

Use a more specific code (2 billable, 9 non-billable)
K20Esophagitishas subcodesK21Gastro-esophageal reflux diseasehas subcodesK22Other diseases of esophagushas subcodesK23Disorders of esophagus in diseases classified elsewhereK25Gastric ulcerhas subcodesK26Duodenal ulcerhas subcodesK27Peptic ulcer, site unspecifiedhas subcodesK28Gastrojejunal ulcerhas subcodesK29Gastritis and duodenitishas subcodesK30Functional dyspepsiaK31Other diseases of stomach and duodenumhas 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)

Instructional Notes

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

Clinical Hierarchy

BillableHas subcodes
CH11Diseases of the digestive system (K00-K95)
K20-K31Diseases of esophagus, stomach and duodenum (K20-K31)Not billable
K20EsophagitisSubcodes
K21Gastro-esophageal reflux diseaseSubcodes
K22Other diseases of esophagusSubcodes
K23Disorders of esophagus in diseases classified elsewhereBillable
K25Gastric ulcerSubcodes
K26Duodenal ulcerSubcodes
K27Peptic ulcer, site unspecifiedSubcodes
K28Gastrojejunal ulcerSubcodes
K29Gastritis and duodenitisSubcodes
K30Functional dyspepsiaBillable
K31Other diseases of stomach and duodenumSubcodes

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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