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W21.0

Non-billable

Struck by hit or thrown ball

W21.0 is the ICD-10-CM code for Struck by hit or thrown ball. It is a non-billable category code — use a more specific child code such as W21.00 for billing.

Status
Header (non-billable)
Chapter
V00-Y99
Parent
W21
Subcodes
9
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 ↗
Sports Safety ↗

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

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code W21.0?
W21.0 is the ICD-10-CM code for "Struck by hit or thrown ball". It falls under V00-Y99 External causes of morbidity.
Is W21.0 a billable code?
No — W21.0 is a non-billable header code. Use a more specific child code (such as W21.00) for billing.
What are the subcodes of W21.0?
W21.0 has 9 more specific child codes, including W21.00, W21.01, W21.02.

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

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