W21.00XA — Struck by hit or thrown ball, unspecified type, initial encounter
Is W21.00XA billable?
Yes, but W21.00XA is an unspecified code. W21.00XA is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, W21.00XA is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting W21.00XA — the more specific alternatives are listed below.
More specific alternatives
- W21.01XAStruck by football, initial encounter
- W21.02XAStruck by soccer ball, initial encounter
- W21.03XAStruck by baseball, initial encounter
- W21.04XAStruck by golf ball, initial encounter
- W21.05XAStruck by basketball, initial encounter
- W21.06XAStruck by volleyball, initial encounter
- W21.07XAStruck by softball, initial encounter
- W21.09XAStruck by other hit or thrown ball, initial encounter
W21.00XA at a glance
| Code | W21.00XA |
|---|---|
| Description | Struck by hit or thrown ball, unspecified type, initial encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "A" | initial encounter |
What does the 7th character "A" mean in W21.00XA?
In W21.00XA, the 7th character A means initial encounter. The 7th character is required for W21.00XA to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
How is W21.00XA listed in the External Cause Index?
The External Cause of Injuries Index lists these routes under W21.00, the nearest indexed parent of W21.00XA. This is a separate index from the Alphabetic Index and is where external cause codes are looked up.
- Struckby › ball (accidentally)
- Struckby › sports equipment › ball (accidentally)
- Struckby › object › projected › in sports › ball (accidentally)
- Struckby › object › thrown › in sports › ball (accidentally)
Excludes1 — never code together — inherited from W20-W49
The conditions below can never be reported together with W21.00XA on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes1 — never code together — inherited from W21
The conditions below can never be reported together with W21.00XA on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
How long has W21.00XA existed?
W21.00XA has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.