Unsp opn wnd r frnt wl of thorax w/o penet thor cavity, init

This code signifies an open wound on the anterior aspect of the right chest wall that does not extend into the thoracic cavity. The specific nature of the wound (e.g., laceration, puncture) is not documented, and it is the initial presentation for treatment.

Apply this code for patients presenting with an uncharacterized open injury to the right front of the chest, such as a superficial laceration or abrasion, where there is no suspicion or evidence of internal organ involvement. This is appropriate for the first encounter for this specific injury.

• Ensure documentation explicitly states "right" and "front wall of thorax" and confirms no penetration into the thoracic cavity.
• If the wound type (e.g., laceration, puncture) is specified, a more precise code from the S21.1 series should be used.
• The "A" suffix indicates an initial encounter; use subsequent suffixes for follow-up care.