Y37.91XA — Military operations involving unspecified weapon of mass destruction [WMD], initial encounter
Is Y37.91XA billable?
Yes, but Y37.91XA is an unspecified code. Y37.91XA is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, Y37.91XA 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 Y37.91XA — the more specific alternatives are listed below.
More specific alternatives
- Y37.000AMilitary operations involving explosion of unspecified marine weapon, military personnel, initial encounter
- Y37.100AMilitary operations involving unspecified destruction of aircraft, military personnel, initial encounter
- Y37.200AMilitary operations involving unspecified explosion and fragments, military personnel, initial encounter
- Y37.300AMilitary operations involving unspecified fire, conflagration and hot substance, military personnel, initial encounter
- Y37.410AMilitary operations involving rubber bullets, military personnel, initial encounter
- Y37.500AMilitary operations involving unspecified effect of nuclear weapon, military personnel, initial encounter
- Y37.6X0AMilitary operations involving biological weapons, military personnel, initial encounter
- Y37.7X0AMilitary operations involving chemical weapons and other forms of unconventional warfare, military personnel, initial encounter
- Y37.A1XALow level blast overpressure in military operations, initial encounter
Y37.91XA at a glance
| Code | Y37.91XA |
|---|---|
| Description | Military 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 Y37.91XA?
In Y37.91XA, the 7th character A means initial encounter. The 7th character is required for Y37.91XA to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
How is Y37.91XA listed in the External Cause Index?
The External Cause of Injuries Index lists these routes under Y37.91, the nearest indexed parent of Y37.91XA. This is a separate index from the Alphabetic Index and is where external cause codes are looked up.
- Military operations › weapon of mass destruction [WMD] (injuries to military and civilians occuring during peacetime on military property and during routine military exercises and operations) (by) (from) (involving)
- Military operations › weapons › of mass destruction [WMD] (injuries to military and civilians occuring during peacetime on military property and during routine military exercises and operations) (by) (from) (involving)
Excludes1 — never code together — inherited from Y37
The conditions below can never be reported together with Y37.91XA on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- military aircraft involved in aircraft accident with civilian aircraft (V97.81-)
- military vehicles involved in transport accident with civilian vehicle (V09.01, V09.21, V19.81, V29.818, V39.81, V49.81, V59.81, V69.81, V79.81)
- military watercraft involved in water transport accident with civilian watercraft (V94.81-)
- war operations (Y36.-)
How long has Y37.91XA existed?
Y37.91XA 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.