Y36.91XA — War operations involving unspecified weapon of mass destruction [WMD], initial encounter
Is Y36.91XA billable?
Yes, but Y36.91XA is an unspecified code. Y36.91XA is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, Y36.91XA 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 Y36.91XA — the more specific alternatives are listed below.
More specific alternatives
- Y36.000AWar operations involving explosion of unspecified marine weapon, military personnel, initial encounter
- Y36.100AWar operations involving unspecified destruction of aircraft, military personnel, initial encounter
- Y36.200AWar operations involving unspecified explosion and fragments, military personnel, initial encounter
- Y36.300AWar operations involving unspecified fire, conflagration and hot substance, military personnel, initial encounter
- Y36.410AWar operations involving rubber bullets, military personnel, initial encounter
- Y36.500AWar operations involving unspecified effect of nuclear weapon, military personnel, initial encounter
- Y36.6X0AWar operations involving biological weapons, military personnel, initial encounter
- Y36.7X0AWar operations involving chemical weapons and other forms of unconventional warfare, military personnel, initial encounter
- Y36.810AExplosion of mine placed during war operations but exploding after cessation of hostilities, military personnel, initial encounter
- Y36.A1XALow level blast overpressure in war operations, initial encounter
Y36.91XA at a glance
| Code | Y36.91XA |
|---|---|
| Description | War operations involving unspecified weapon of mass destruction [WMD], 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 Y36.91XA?
In Y36.91XA, the 7th character A means initial encounter. The 7th character is required for Y36.91XA to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
How is Y36.91XA listed in the External Cause Index?
The External Cause of Injuries Index lists these routes under Y36.91, the nearest indexed parent of Y36.91XA. This is a separate index from the Alphabetic Index and is where external cause codes are looked up.
- War operations › weapon of mass destruction [WMD] (injuries to military personnel and civilians during war, civil insurrection and peacekeeping missions) (by) (from) (involving)
- War operations › weapons › of mass destruction [WMD] (injuries to military personnel and civilians during war, civil insurrection and peacekeeping missions) (by) (from) (involving)
Excludes1 — never code together — inherited from Y36
The conditions below can never be reported together with Y36.91XA 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 Y36.91XA existed?
Y36.91XA 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.