Coma scale, best motor response, none, in the field

This code indicates a patient's complete lack of motor response to stimuli, assessed as part of the Glasgow Coma Scale (GCS), specifically when evaluated by emergency medical services (EMS) personnel in a pre-hospital setting. It signifies the most severe level of motor impairment, indicating deep unconsciousness or brain injury.

Apply this code when EMS documentation clearly states a GCS motor score of 1 (no motor response) during their initial assessment in the field. This is typically seen in cases of severe trauma, cardiac arrest, stroke, or other critical medical emergencies leading to profound neurological compromise.

• Always ensure the documentation specifies "in the field" or "pre-hospital" assessment by EMT/ambulance personnel.
• Do not use this code if the GCS assessment was performed in the emergency department or hospital setting.
• This code should be sequenced after the primary diagnosis indicating the underlying cause of the coma or altered mental status.