S45.099A Other specified injury of axillary artery, unspecified side, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S45.099 with 7th character A (initial encounter).

Applies from S45 Injury of blood vessels at shoulder and upper arm level

Excludes2 (not included here)

• injury of subclavian artery (S25.1)
• injury of subclavian vein (S25.3)

Code also

• any associated open wound (S41.-)

7th character note

• The appropriate 7th character is to be added to each code from category S45

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Medicare Code Edits (MCE v43.1 (April 2026))

• Unspecified code (laterality): Unspecified codes for which a more specific code identifying laterality (right, left, bilateral) exists within the same code family.

Nearby codes

• S45.092 Other specified injury of axillary artery, left side
• S45.092A Other specified injury of axillary artery, left side, initial encounter
• S45.092D Other specified injury of axillary artery, left side, subsequent encounter
• S45.092S Other specified injury of axillary artery, left side, sequela
• S45.099 Other specified injury of axillary artery, unspecified side
• S45.099A Other specified injury of axillary artery, unspecified side, initial encounter (this code)
• S45.099D Other specified injury of axillary artery, unspecified side, subsequent encounter
• S45.099S Other specified injury of axillary artery, unspecified side, sequela
• S45.1 Injury of brachial artery
• S45.10 Unspecified injury of brachial artery
• S45.101 Unspecified injury of brachial artery, right side