Prior to October 1, 2016, the coma scale was only reported in conjunction with traumatic brain injuries, acute cerebrovascular disease or sequelae of cerebrovascular disease codes. Coders should now be reporting the GCS when documented on any case where there is monitoring of the central nervous system regardless of the medical condition requiring the monitoring. The documentation of the coma scale may be found documented by other clinicians involved in the care of the patient (EMT, nursing) and not only by the physician. The physician must have documented the associated diagnosis (why the GCS is being addressed) such as encephalopathy, stroke, overdose, etc.