S42.409
⚠ Non-billable (Header)Unspecified fracture of lower end of unspecified humerus
Injury, poisoning and certain other consequences of external causes (S00-T88)
⚠️ This is a category header code — not billable. Use a more specific child code below.
✅ No additional coding notes for S42.409
Child Codes (7)
S42.409AUnspecified fracture of lower end of unspecified humerus, initial encounter for closed fractureS42.409BUnspecified fracture of lower end of unspecified humerus, initial encounter for open fractureS42.409DUnspecified fracture of lower end of unspecified humerus, subsequent encounter for fracture with routine healingS42.409GUnspecified fracture of lower end of unspecified humerus, subsequent encounter for fracture with delayed healingS42.409KUnspecified fracture of lower end of unspecified humerus, subsequent encounter for fracture with nonunionS42.409PUnspecified fracture of lower end of unspecified humerus, subsequent encounter for fracture with malunionS42.409SUnspecified fracture of lower end of unspecified humerus, sequela
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CodeS42.409
BillableNo — Header code
ParentS42.40
CategoryInjury, poisoning and certain other consequences of external causes (S00-T88)
Excludes10 rule(s)
Excludes20 note(s)
Child codes7
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)