Y37.A1XS — Low level blast overpressure in military operations, sequela
Is Y37.A1XS billable?
Yes — Y37.A1XS is billable for FY2027. Y37.A1XS is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Y37.A1XS may be submitted for encounters from October 1, 2026 through September 30, 2027.
Y37.A1XS at a glance
| Code | Y37.A1XS |
|---|---|
| Description | Low level blast overpressure in military operations, sequela |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "S" | sequela |
What does the 7th character "S" mean in Y37.A1XS?
In Y37.A1XS, the 7th character S means sequela. The 7th character is required for Y37.A1XS to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
How is Y37.A1XS listed in the External Cause Index?
The External Cause of Injuries Index lists these routes under Y37.A1, the nearest indexed parent of Y37.A1XS. This is a separate index from the Alphabetic Index and is where external cause codes are looked up.
- 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.A1XS.
- 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.A1XS 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.A1XS is sequenced first depends on the reason for the encounter.
How long has Y37.A1XS existed?
Y37.A1XS 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.