Y37.A1 — Low level blast overpressure in military operations
Is Y37.A1 billable?
No — Y37.A1 is a non-billable header code. Y37.A1 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 3 billable codes beneath Y37.A1.
Y37.A1 at a glance
| Code | Y37.A1 |
|---|---|
| Description | Low level blast overpressure in military operations |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is Y37.A1 listed in the External Cause Index?
These are the routes through the External Cause of Injuries Index that lead to Y37.A1 — how the injury happened, rather than what the injury was.
- Military operations › LLB 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 › low 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.A1.
- LLB overpressure in military operations
- Low level blast overpressure due to explosion in military operations
Excludes1 — never code together — inherited from Y37
The conditions below can never be reported together with Y37.A1 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.A1 is sequenced first depends on the reason for the encounter.
What codes fall under Y37.A1? (3)
How long has Y37.A1 existed?
Y37.A1 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.