FY2027 ICD-10-CM reference
K26: Duodenal ulcer
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Duodenal ulcer. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Nonbillable heading. Verified against the official FY2027 order file.
More specific FY2027 codes
- K26.0: Acute duodenal ulcer with hemorrhageBillable code
- K26.1: Acute duodenal ulcer with perforationBillable code
- K26.2: Acute duodenal ulcer with both hemorrhage and perforationBillable code
- K26.3: Acute duodenal ulcer without hemorrhage or perforationBillable code
- K26.4: Chronic or unspecified duodenal ulcer with hemorrhageBillable code
- K26.5: Chronic or unspecified duodenal ulcer with perforationBillable code
- K26.6: Chronic or unspecified duodenal ulcer with both hemorrhage and perforationBillable code
- K26.7: Chronic duodenal ulcer without hemorrhage or perforationBillable code
- K26.9: Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforationBillable code
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Excludes2
certain conditions originating in the perinatal period (P04-P96)
Source: K00-K95 (chapter, inherited).
Excludes2
certain infectious and parasitic diseases (A00-B99)
Source: K00-K95 (chapter, inherited).
Excludes2
complications of pregnancy, childbirth and the puerperium (O00-O9A)
Source: K00-K95 (chapter, inherited).
Excludes2
congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
Source: K00-K95 (chapter, inherited).
Excludes2
endocrine, nutritional and metabolic diseases (E00-E88)
Source: K00-K95 (chapter, inherited).
Excludes2
injury, poisoning and certain other consequences of external causes (S00-T88)
Source: K00-K95 (chapter, inherited).
Excludes2
neoplasms (C00-D49)
Source: K00-K95 (chapter, inherited).
Excludes2
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: K00-K95 (chapter, inherited).
Excludes2
hiatus hernia (K44.-)
Source: K20-K31 (section, inherited).
Includes
erosion (acute) of duodenum
Source: K26 (category, direct).
Includes
duodenum ulcer (peptic)
Source: K26 (category, direct).
Includes
postpyloric ulcer (peptic)
Source: K26 (category, direct).
Instructional note
code to identify:
Source: K26 (category, direct).
Instructional note
alcohol abuse and dependence (F10.-)
Source: K26 (category, direct).
Excludes1
peptic ulcer NOS (K27.-)
Source: K26 (category, direct).
Compare the FY2027 additions, removals and billable-status changes
What does K26 mean in FY2027?
The official ICD-10-CM descriptor is Duodenal ulcer. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is K26 billable in FY2027?
The FY2027 order file marks K26 as a nonbillable heading. Select a complete billable child code.
Does K26 map to an HCC?
Risk-model mapping is not applicable to this nonbillable heading. Check a complete billable child code.
Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.
Review the FY2026 April edition