ICD-10-CM > R00-R99 > R25-R29 > R25 R25 Abnormal involuntary movements Non-Billable/Non-Specific Type 1 Excludes specific movement disorders (G20-G26)stereotyped movement disorders (F98.4)tic disorders (F95.-) Codes R25.0Abnormal head movementsR25.1Tremor, unspecifiedR25.2Cramp and spasmR25.3FasciculationR25.8Other abnormal involuntary movementsR25.9Unspecified abnormal involuntary movements