Y37.A2XA — High level blast overpressure in military operations, initial encounter
Is Y37.A2XA billable?
Yes — Y37.A2XA is billable for FY2027. Y37.A2XA is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Y37.A2XA may be submitted for encounters from October 1, 2026 through September 30, 2027.
Y37.A2XA at a glance
| Code | Y37.A2XA |
|---|---|
| Description | High level blast overpressure in military operations, 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.A2XA?
In Y37.A2XA, the 7th character A means initial encounter. The 7th character is required for Y37.A2XA to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
How is Y37.A2XA listed in the External Cause Index?
The External Cause of Injuries Index lists these routes under Y37.A2, the nearest indexed parent of Y37.A2XA. This is a separate index from the Alphabetic Index and is where external cause codes are looked up.
- Military operations › HLB overpressure (injuries to military and civilians occuring during peacetime on military property and during routine military exercises and operations) (by) (from) (involving)
- Military operations › blast overpressure › high level (injuries to military and civilians occuring during peacetime on military property and during routine military exercises and operations) (by) (from) (involving)
Inclusion terms
Alternative wording in documentation that is classified to Y37.A2XA.
- High level blast overpressure due to explosion in military operations
- HLB overpressure in military operations
Excludes1 — never code together — inherited from Y37
The conditions below can never be reported together with Y37.A2XA 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.-)
Code also — inherited from Y37.A
Two codes may be needed to describe the condition fully. Whether Y37.A2XA is sequenced first depends on the reason for the encounter.
How long has Y37.A2XA existed?
Y37.A2XA first appears in FY2026.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.