Unsp injury of right innominate or subclavian artery, subs

This code signifies an unspecified injury to the right innominate (brachiocephalic) or subclavian artery. It indicates that the specific nature of the arterial damage (e.g., laceration, contusion, dissection) is not documented, and the patient is receiving follow-up care for this injury.

Use this code when a patient presents for subsequent treatment, monitoring, or evaluation of a previously sustained, but unspecified, injury to the right innominate or subclavian artery. This applies when the initial injury has been treated, and the encounter is for ongoing management rather than the initial acute care.

• Requires a seventh character "D" for subsequent encounter, indicating active treatment or follow-up.
• Only use when the specific type of arterial injury (e.g., laceration, puncture, rupture) is not documented.
• Always sequence after the primary injury code if applicable, or as the primary diagnosis if the encounter is solely for follow-up of this injury.