S55.009A Unspecified injury of ulnar artery at forearm level, unspecified arm, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S55.009 with 7th character A (initial encounter).

Applies from S55 Injury of blood vessels at forearm level

Excludes2 (not included here)

• injury of blood vessels at wrist and hand level (S65.-)
• injury of brachial vessels (S45.1-S45.2)

Code also

• any associated open wound (S51.-)

7th character note

• The appropriate 7th character is to be added to each code from category S55

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

• S55.002 Unspecified injury of ulnar artery at forearm level, left arm
• S55.002A Unspecified injury of ulnar artery at forearm level, left arm, initial encounter
• S55.002D Unspecified injury of ulnar artery at forearm level, left arm, subsequent encounter
• S55.002S Unspecified injury of ulnar artery at forearm level, left arm, sequela
• S55.009 Unspecified injury of ulnar artery at forearm level, unspecified arm
• S55.009A Unspecified injury of ulnar artery at forearm level, unspecified arm, initial encounter (this code)
• S55.009D Unspecified injury of ulnar artery at forearm level, unspecified arm, subsequent encounter
• S55.009S Unspecified injury of ulnar artery at forearm level, unspecified arm, sequela
• S55.01 Laceration of ulnar artery at forearm level
• S55.011 Laceration of ulnar artery at forearm level, right arm
• S55.011A Laceration of ulnar artery at forearm level, right arm, initial encounter