W21.04 is the authoritative medical code for Struck by golf ball. This classification is used in medical billing and clinical recording to specify the clinical criteria for struck by golf ball (ICD-10-CM W21.04), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Struck by golf ball is a non-billable ICD-10-CM category code W21.04. A more specific billable subcode must be selected for claims submission. Excludes1 (not coded here): assault with sports equipment Y08.0-; striking against or struck by sports equipment with subsequent fall W18.01; assault X92-Y09; contact or collision with animals or persons W50-W64; exposure to inanimate mechanical forces involving military or war operations (Y36.-, Y37.-); intentional self-harm X71-X83. 7th character: The appropriate 7th character is to be added to each code from category W21.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for W21.04 in the official ICD-10-CM tabular list.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- assault with sports equipment Y08.0-
- striking against or struck by sports equipment with subsequent fall W18.01
- assault X92-Y09
- contact or collision with animals or persons W50-W64
- exposure to inanimate mechanical forces involving military or war operations (Y36.-, Y37.-)
- intentional self-harm X71-X83
Frequently Asked Questions (FAQ) & Clinical Guidance
Can W21.04 be billed directly?
No. W21.04 (Struck by golf ball) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does W21.04 require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category W21.
What can't be coded together with W21.04?
Per Excludes1 instructions, W21.04 must not be reported with: assault with sports equipment (Y08.0-); striking against or struck by sports equipment with subsequent fall (W18.01); assault (X92-Y09); contact or collision with animals or persons (W50-W64).
Codes in This Family (3)
Official ICD-10-CM classifications in the same code family as W21.04, with their registry titles.
- W21.04A — Struck by golf ball, initial encounter
- W21.04D — Struck by golf ball, subsequent encounter
- W21.04S — Struck by golf ball, sequela
Indexed As (4)
Circumstance phrases from the official ICD-10-CM External Cause of Injuries Index that map to this code.
- Struckby (accidentally), ball (hit) (thrown), golf ball
- Struckby (accidentally), object, projected, in sports, ball, golf ball
- Struckby (accidentally), object, thrown, in sports, ball, golf ball
- Struckby (accidentally), sports equipment, ball, golf ball
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: