ICD-10 W51
Non-Billable HeaderAccidental striking against or bumped into by another person
About ICD-10-CM W51
ICD-10-CM code W51 represents Accidental striking against or bumped into by another person. This is a non-billable header code in the External Causes of Morbidity chapter (block W51). The 2026 edition of ICD-10-CM W51 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Type 1 Excludes
Pure excludes, these codes can never be coded together with W51. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- assault by striking against or bumping into by another person (Y04.2)
- fall due to collision with another person (W03)
Coding Notes
Seven Chr Note
- The appropriate 7th character is to be added to code W51
Medicare LCD Coverage for W51
Local Coverage Determinations (LCDs) from CMS MACs that list W51 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing W51.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but W51 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with W51
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To W51
Other codes in section W50-W64 (Exposure to animate mechanical forces).
ICD-10 W51, Billing FAQ
Is ICD-10 code W51 billable? +
No, W51 is a non-billable header code. Use a more specific child code from block W51 when submitting claims.
What codes are Type 1 Excludes for W51? +
Type 1 Excludes (never code together with W51): assault by striking against or bumping into by another person (Y04.2); fall due to collision with another person (W03)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 2, 2026.
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