Concussion with loss of consciousness of unspecified duration

This code signifies a cerebral concussion where the patient experienced a period of unconsciousness, but the exact duration of that unconsciousness is not documented or specified. It indicates a transient neurological dysfunction resulting from head trauma, characterized by an alteration in mental status.

Apply this code when documentation clearly states a concussion occurred with associated loss of consciousness, but the medical record lacks specific details regarding how long the patient was unconscious. This is appropriate when the physician's notes mention "concussion with LOC" without further time qualification.

• Differentiate from concussions without loss of consciousness (850.0-850.4) or those with specified durations (850.1-850.3).
• Always sequence this code as the primary diagnosis when it is the reason for the encounter.
• Avoid using this code if the documentation provides any specific duration of unconsciousness, even if brief.