Concussion w loss of consciousness of unsp duration, sequela

This code signifies the long-term effects or complications arising from a concussion that involved an unspecifiable period of unconsciousness. It indicates that the acute phase of the concussion has passed, and the patient is now experiencing residual symptoms or conditions directly attributable to the original brain injury.

Use this code when a patient presents with persistent neurological, cognitive, or psychological symptoms (e.g., post-concussion syndrome, chronic headaches, memory issues) that are documented as sequelae of a concussion with loss of consciousness of unknown duration. Documentation should clearly link the current symptoms to a past concussion event.

• Always ensure the medical record explicitly states the current condition is a "sequela" or "late effect" of a previous concussion.
• Do not use this code for acute concussion management; it is specifically for the long-term consequences.
• Code any specific sequelae (e.g., chronic headache, cognitive deficits) in addition to this sequela code, following the sequencing guidelines for late effects.