X99.9XXA — Assault by unspecified sharp object, initial encounter
Is X99.9XXA billable?
Yes, but X99.9XXA is an unspecified code. X99.9XXA is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, X99.9XXA 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 X99.9XXA — the more specific alternatives are listed below.
X99.9XXA at a glance
| Code | X99.9XXA |
|---|---|
| Description | Assault by unspecified sharp object, 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 X99.9XXA?
In X99.9XXA, the 7th character A means initial encounter. The 7th character is required for X99.9XXA to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
How is X99.9XXA listed in the External Cause Index?
The External Cause of Injuries Index lists these routes under X99.9, the nearest indexed parent of X99.9XXA. This is a separate index from the Alphabetic Index and is where external cause codes are looked up.
- Assault › cutting or piercing instrument (homicidal) (by) (in)
- Beheading › homicide (by guillotine)
- DecapitationNEC › homicide (accidental circumstances)
Inclusion terms
Alternative wording in documentation that is classified to X99.9XXA.
- Assault by stabbing NOS
Excludes1 — never code together — inherited from X92-Y09
The conditions below can never be reported together with X99.9XXA 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 X99
The conditions below can never be reported together with X99.9XXA on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- assault by strike by sports equipment (Y08.0-)
How long has X99.9XXA existed?
X99.9XXA 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.