W21.4
ICD-10Non-billable categoryStriking against diving board
Official ICD-10-CM descriptor (FY2026)
Striking against diving board
W21.4 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Use additional code
Report an additional code to identify the associated condition.
- code for subsequent falling into water, if applicable (W16.-)
Related codes in W21
- W21.0Struck by hit or thrown ballcategory
- W21.1Struck by bat, racquet or clubcategory
- W21.2Struck by hockey stick or puckcategory
- W21.3Struck by sports foot wearcategory
- W21.8Striking against or struck by other sports equipmentcategory
- W21.9Striking against or struck by unspecified sports equipmentcategory
Where this code sits
- Parent code
- W21
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.