W21.4XXD — Striking against diving board, subsequent encounter
Is W21.4XXD billable?
Yes — W21.4XXD is billable for FY2027. W21.4XXD is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. W21.4XXD may be submitted for encounters from October 1, 2026 through September 30, 2027.
W21.4XXD at a glance
| Code | W21.4XXD |
|---|---|
| Description | Striking against diving board, subsequent encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "D" | subsequent encounter |
What does the 7th character "D" mean in W21.4XXD?
In W21.4XXD, the 7th character D means subsequent encounter. The 7th character is required for W21.4XXD to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
How is W21.4XXD listed in the External Cause Index?
The External Cause of Injuries Index lists these routes under W21.4, the nearest indexed parent of W21.4XXD. This is a separate index from the Alphabetic Index and is where external cause codes are looked up.
- Striking against › diving board
- Fall, falling › into › water › hitting diving board (accidental)
Use additional code
Report an additional code alongside W21.4XXD to fully describe the condition. W21.4XXD is sequenced first.
- code for subsequent falling into water, if applicable (W16.-)
Excludes1 — never code together — inherited from W20-W49
The conditions below can never be reported together with W21.4XXD 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 W21.4XXD on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Use additional code — inherited from W21.4
Report an additional code alongside W21.4XXD to fully describe the condition. W21.4XXD is sequenced first.
- code for subsequent falling into water, if applicable (W16.-)
How long has W21.4XXD existed?
W21.4XXD 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.