W21

Non-billable

Striking against or struck by sports equipment

W21 is the ICD-10-CM code for Striking against or struck by sports equipment. It is a non-billable category code — use a more specific child code such as W21.0 for billing.

Status
Header (non-billable)
Chapter
V00-Y99
Subcodes
7
Edition
FY2026

V00-Y99 External causes of morbidity

What this means — in plain language

MedlinePlus · NIH

Exercising is good for you, but sometimes you can injure yourself when you play sports or exercise. Accidents, poor training practices, or improper gear can cause them. Some people get hurt because they are not in shape. Not warming up or stretching enough can also lead to injuries. The most common sports injuries are: Sprains and strains Knee injuries Swollen muscles Achilles tendon injuries Pain along the shin…

Read more about Sports Injuries at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Excludes1 — not coded here

  • assault with sports equipment (Y08.0-)
  • striking against or struck by sports equipment with subsequent fall (W18.01)

Frequently asked questions

What is ICD-10 code W21?
W21 is the ICD-10-CM code for "Striking against or struck by sports equipment". It falls under V00-Y99 External causes of morbidity.
Is W21 a billable code?
No — W21 is a non-billable header code. Use a more specific child code (such as W21.0) for billing.
What are the subcodes of W21?
W21 has 7 more specific child codes, including W21.0, W21.1, W21.2.
What is excluded from W21?
Excludes1 (not coded here): assault with sports equipment (Y08.0-); striking against or struck by sports equipment with subsequent fall (W18.01).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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