External constriction of part of scalp, subsequent encounter

This code describes an injury to the scalp caused by an external force that constricts or compresses the tissue, such as from a tight headband, helmet, or other object. It specifically indicates that this is a follow-up encounter for the management of this previously diagnosed injury.

Use this code when a patient presents for ongoing care, follow-up, or treatment of a scalp injury due to external constriction, after the initial encounter for the injury. Documentation should clearly state "subsequent encounter" or indicate follow-up care for the specific injury.

• Ensure documentation specifies "subsequent encounter" for accurate coding.
• Distinguish from initial encounters (S00.04XA) or sequelae (S00.04XS).
• Always code the underlying cause of the external constriction if known and documented.