Concussion with LOC status unknown, sequela

This code signifies the long-term effects or complications arising from a concussion where the duration of loss of consciousness (LOC) was not documented or is unknown. It indicates that the patient is experiencing persistent symptoms or conditions directly attributable to a past concussive event.

Apply this code when a patient presents with sequelae (e.g., post-concussion syndrome, cognitive deficits, persistent headaches) from a previous concussion where the initial injury documentation did not specify the duration of LOC. This code is appropriate for encounters addressing these chronic or residual effects, not the acute injury itself. Documentation should clearly link the current symptoms to a past concussion.

• Always sequence this sequela code after the code for the specific residual condition being treated.
• Do not use this code for acute concussions; instead, refer to the acute concussion codes within the S06.0X- series.
• Ensure documentation explicitly states the current condition is a "sequela" or "due to" a prior concussion with unknown LOC.