Laceration of ulnar artery at wrs/hnd lv of unsp arm, init

This code signifies a laceration of the ulnar artery, specifically located at the wrist or hand level. It indicates an open injury to this major blood vessel, requiring medical attention for repair and management. The "unspecified arm" component means the laterality (left or right) is not documented.

Apply this code for patients presenting with an acute traumatic injury resulting in a cut or tear to the ulnar artery in the wrist or hand. This is appropriate for initial encounters where the patient is receiving active treatment for the laceration.

• Ensure documentation specifies the injury is a laceration of the ulnar artery, not just a general hand wound.
• Verify the encounter is "initial" for active treatment; subsequent care will use different encounter characters.
• If laterality (left/right arm) is documented, use the more specific code (S65.011A or S65.012A).