S42.366
⚠ Non-billable (Header)Nondisplaced segmental fracture of shaft of humerus, unspecified arm
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 S42.366
Child Codes (7)
S42.366ANondisplaced segmental fracture of shaft of humerus, unspecified arm, initial encounter for closed fractureS42.366BNondisplaced segmental fracture of shaft of humerus, unspecified arm, initial encounter for open fractureS42.366DNondisplaced segmental fracture of shaft of humerus, unspecified arm, subsequent encounter for fracture with routine healingS42.366GNondisplaced segmental fracture of shaft of humerus, unspecified arm, subsequent encounter for fracture with delayed healingS42.366KNondisplaced segmental fracture of shaft of humerus, unspecified arm, subsequent encounter for fracture with nonunionS42.366PNondisplaced segmental fracture of shaft of humerus, unspecified arm, subsequent encounter for fracture with malunionS42.366SNondisplaced segmental fracture of shaft of humerus, unspecified arm, sequela
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CodeS42.366
BillableNo — Header code
ParentS42.36
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)