S22.5
⚠ Non-billable (Header)Flail chest
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.
❌ Excludes1
inherited from S22Rules from parent category S22: Fracture of rib(s), sternum and thoracic spine
- • transection of thorax (S28.1)
⚠️ Excludes2
inherited from S22Rules from parent category S22: Fracture of rib(s), sternum and thoracic spine
- • fracture of clavicle (S42.0-)
- • fracture of scapula (S42.1-)
Child Codes (6)
S22.5XXAFlail chest, initial encounter for closed fractureS22.5XXBFlail chest, initial encounter for open fractureS22.5XXDFlail chest, subsequent encounter for fracture with routine healingS22.5XXGFlail chest, subsequent encounter for fracture with delayed healingS22.5XXKFlail chest, subsequent encounter for fracture with nonunionS22.5XXSFlail chest, sequela
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CodeS22.5
BillableNo — Header code
ParentS22
CategoryInjury, poisoning and certain other consequences of external causes (S00-T88)
Excludes11 rule(s)
Excludes22 note(s)
Child codes6
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)