Y37.A1: Low level blast overpressure in military operations

New code · FY2026

Not billable: this is a header. Use one of the more specific codes below.

• New code, effective October 1, 2025 (FY2026).

Code breakdown

Coding notes

Inclusion terms

• LLB overpressure in military operations
• Low level blast overpressure due to explosion in military operations

Code also (from Y37.A)

• type of explosive, if known
• accidental detonation of onboard munitions (Y37.140)
• explosion of grenade (Y37.290)
• explosion of torpedo (Y37.040)
• improvised explosive device (Y37.230)

Includes (from Y37)

• injuries to military personnel and civilians occurring during peacetime on military property and during routine military exercises and operations

Excludes1 (from Y37)

• 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.-)

7th character (from Y37)

• The appropriate 7th character is to be added to each code from category Y37

7th characters (category Y37)

• A initial encounter
• D subsequent encounter
• S sequela

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All FY2026 ICD-10-CM changes

ICD-10-CM codes and descriptions are from the CMS and NCHS code files. Coverage is from the CMS Medicare Coverage Database billing and coding articles.