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K26.3 ICD-10-CA code: Duodenal ulcer, acute without haemorrhage or perforation

K26.3 is the ICD-10-CA code for “Duodenal ulcer, acute without haemorrhage or perforation” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

K26.3

Duodenal ulcer, acute without haemorrhage or perforation

Short description: Acute duodenal ulcer wo haem or perf

ICD-10-CA · Canada · Also written K263

Index terms

Entries in CIHI’s alphabetical index that lead to K26.3. Searching the index by the condition the note names is how coders reach this code.

  • Ulcer, ulcerated, ulcerating, ulceration, ulcerative, duodenum, duodenal (eroded) (peptic), acute

Notes for K26.3

As CIHI prints them, with any note K26.3 takes from the headings above it.

Includes

  • Erosion (acute) of duodenumulcer (peptic):• duodenal• postpyloricFrom K26 Duodenal ulcer

Use additional code

Add a code for this detail when the note documents it.

  • Use additional code to identify Helicobacter pylori (B98.0) if present.From K26 Duodenal ulcer
  • Use additional external cause code (Chapter XX) to identify drug, if drug-induced.From K26 Duodenal ulcer

Excludes

Conditions classified elsewhere.

  • Peptic ulcer NOS (K27.-)From K26 Duodenal ulcer
  • Hiatus hernia (K44.-)From K20-K31 Diseases of oesophagus, stomach and duodenum
  • Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 11: Diseases of the digestive system (K00-K93)

Where K26.3 sits

  1. 1ChapterChapter 11: Diseases of the digestive system (K00-K93)
  2. 2Block K20-K31Diseases of oesophagus, stomach and duodenum
  3. 3Category K26Duodenal ulcer
  4. 4Valid code K26.3Duodenal ulcer, acute without haemorrhage or perforation

Source and release

Data release
ICD-10-CA · FY 2026–2027
Effective date
Apr 1, 2026
Publisher
CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See K26.3 in the CIHI source

Frequently asked questions

What does ICD-10-CA code K26.3 mean?

K26.3 is the ICD-10-CA code for “Duodenal ulcer, acute without haemorrhage or perforation” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is K26.3 in ICD-10-CA?

K26.3 sits under K26 Duodenal ulcer, within K20-K31 Diseases of oesophagus, stomach and duodenum, within Chapter 11: Diseases of the digestive system (K00-K93).

What coding notes apply to K26.3?

ICD-10-CA lists Includes, Use additional code, Excludes notes for K26.3, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

Codes beside K26.3

K26.0Duodenal ulcer, acute with haemorrhageK26.1Duodenal ulcer, acute with perforationK26.2Duodenal ulcer, acute with both haemorrhage and perforationK26.4Duodenal ulcer, chronic or unspecified with haemorrhageK26.5Duodenal ulcer, chronic or unspecified with perforationK26.6Duodenal ulcer, chronic or unspecified with both haemorrhage and perforationK26.7Duodenal ulcer, chronic without haemorrhage or perforationK26.9Duodenal ulcer, unspecified as acute or chronic, without haemorrhage or perforation