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K26Non-billableSave

K26 - Duodenal ulcer

ICD-10-CM Chapter 11: Diseases of the digestive system · K20-K31 Diseases of esophagus, stomach and duodenum (K20-K31) · Top-level category · FY2027

Coding Guidance

K26 is a non-billable heading. Report one of the 9 more specific codes below.

Includes, Excludes and Coding Notes

IncludesFrom K26

Conditions this code covers.

  • erosion (acute) of duodenum
  • duodenum ulcer (peptic)
  • postpyloric ulcer (peptic)
Excludes 1 — Not Coded HereFrom K26

Mutually exclusive: these conditions are never reported together with this code.

  • peptic ulcer NOS (K27.-)
Use Additional CodeFrom K26

Add a secondary code to identify the associated condition or cause when it is documented.

  • code to identify:
  • alcohol abuse and dependence (F10.-)
Excludes 2 — Not Included HereFrom K20-K31 Diseases of esophagus, stomach and duodenum (K20-K31)

Not part of this code; report both codes when the patient has both conditions.

  • hiatus hernia (K44.-)
Excludes 2 — Not Included HereFrom Chapter K00-K95

Not part of this code; report both codes when the patient has both conditions.

  • 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)

More Specific Codes (9)

K26.0Acute duodenal ulcer with hemorrhage→K26.1Acute duodenal ulcer with perforation→K26.2Acute duodenal ulcer with both hemorrhage and perforation→K26.3Acute duodenal ulcer without hemorrhage or perforation→K26.4Chronic or unspecified duodenal ulcer with hemorrhage→K26.5Chronic or unspecified duodenal ulcer with perforation→K26.6Chronic or unspecified duodenal ulcer with both hemorrhage and perforation→K26.7Chronic duodenal ulcer without hemorrhage or perforation→K26.9Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforation→

Related condition guides

Documentation requirements, coding pitfalls and FAQs for conditions coded with K26.