Y37.531A — Military operations involving thermal radiation effect of nuclear weapon, civilian, initial encounter
Is Y37.531A billable?
Yes — Y37.531A is billable for FY2027. Y37.531A is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Y37.531A may be submitted for encounters from October 1, 2026 through September 30, 2027.
Y37.531A at a glance
| Code | Y37.531A |
|---|---|
| Description | Military operations involving thermal radiation effect of nuclear weapon, civilian, 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 Y37.531A?
In Y37.531A, the 7th character A means initial encounter. The 7th character is required for Y37.531A to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
How is Y37.531A listed in the External Cause Index?
The External Cause of Injuries Index lists these routes under Y37.53, the nearest indexed parent of Y37.531A. This is a separate index from the Alphabetic Index and is where external cause codes are looked up.
- Military operations › nuclear weapon › direct heat (injuries to military and civilians occuring during peacetime on military property and during routine military exercises and operations) (by) (from) (involving)
- Military operations › nuclear weapon › fireball (injuries to military and civilians occuring during peacetime on military property and during routine military exercises and operations) (by) (from) (involving)
- Military operations › nuclear weapon › thermal radiation (injuries to military and civilians occuring during peacetime on military property and during routine military exercises and operations) (by) (from) (involving)
- Military operations › nuclear weapon › radiation › thermal (injuries to military and civilians occuring during peacetime on military property and during routine military exercises and operations) (by) (from) (involving)
- Military operations › weapons › nuclear › direct heat (injuries to military and civilians occuring during peacetime on military property and during routine military exercises and operations) (by) (from) (involving)
- Military operations › weapons › nuclear › fireball (injuries to military and civilians occuring during peacetime on military property and during routine military exercises and operations) (by) (from) (involving)
- Military operations › weapons › nuclear › radiation › thermal (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 Y37.531A 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 Y37.531A existed?
Y37.531A 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.