All ICD10 Codes

K26

Non-Billable
ChapterK00–K95
Rankcategory
Official Description

Duodenal ulcer

Use a more specific code (9 billable)
K26.0Acute duodenal ulcer with hemorrhageK26.1Acute duodenal ulcer with perforationK26.2Acute duodenal ulcer with both hemorrhage and perforationK26.3Acute duodenal ulcer without hemorrhage or perforationK26.4Chronic or unspecified duodenal ulcer with hemorrhageK26.5Chronic or unspecified duodenal ulcer with perforationK26.6Chronic or unspecified duodenal ulcer with both hemorrhage and perforationK26.7Chronic duodenal ulcer without hemorrhage or perforationK26.9Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforation
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
  • erosion (acute) of duodenum
  • duodenum ulcer (peptic)
  • postpyloric ulcer (peptic)
Excludes1(Not coded here. Use a different code.)
  • peptic ulcer NOS (K27.-)
Use Additional Code
  • code to identify:
  • alcohol abuse and dependence (F10.-)

Clinical Hierarchy

BillableHas subcodes
CH11Diseases of the digestive system (K00-K95)
K20-K31Diseases of esophagus, stomach and duodenum (K20-K31)
K26Duodenal ulcerNot billable
K26.0Acute duodenal ulcer with hemorrhageBillable
K26.1Acute duodenal ulcer with perforationBillable
K26.2Acute duodenal ulcer with both hemorrhage and perforationBillable
K26.3Acute duodenal ulcer without hemorrhage or perforationBillable
K26.4Chronic or unspecified duodenal ulcer with hemorrhageBillable
K26.5Chronic or unspecified duodenal ulcer with perforationBillable
K26.6Chronic or unspecified duodenal ulcer with both hemorrhage and perforationBillable
K26.7Chronic duodenal ulcer without hemorrhage or perforationBillable
K26.9Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforationBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to K26:

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

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