Tic Disorder - Classification

Classification

Tic disorders are classified as follows:

• Transient tic disorder consists of multiple motor and/or phonic tics with duration of at least 4 weeks, but less than 12 months.
• Chronic tic disorder is either single or multiple motor or phonic tics, but not both, which are present for more than a year.
• Tourette syndrome is diagnosed when both motor and phonic tics are present for more than a year.
• Tic Disorder NOS is diagnosed when tics are present, but do not meet the criteria for any specific tic disorder.

Tic disorders onset in childhood (before the age of 18), and are not due to the effects of medication or another medical condition.

DSM-IV-TR diagnosis codes for the tic disorders are:

• 307.20 Tic Disorder NOS (Not Otherwise Specified)
• 307.21 Transient Tic Disorder
• 307.22 Chronic Motor or Vocal Tic Disorder
• 307.23 Tourette's Disorder

ICD10 diagnosis codes are:

• F95.0 Transient tic disorder
• F95.1 Chronic motor or vocal tic disorder
• F95.2 Combined vocal and multiple motor tic disorder
• F95.8 Other tic disorders
• F95.9 Tic disorder, unspecified