Tic disorders are defined in the Diagnostic and Statistical Manual of Mental Disorders (DSM) based on type (motor or phonic) and duration of tics (sudden, rapid, nonrhythmic movements). Tic disorders are defined similarly by the World Health Organization (ICD-10 codes). Classification
DSM-5
The fifth revision of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), published in May 2013, classifies Tourette syndrome and tic disorders as motor disorders listed in the neurodevelopmental disorder category.Tic disorders, in ascending order of severity, are:
307.20 Other specified tic disorder (specify reason)
307.20 Unspecified tic disorder
307.21 Provisional tic disorder
307.22 Persistent (chronic) motor or vocal tic disorder (specify motor or vocal)
307.23 Tourettes disorderDevelopmental coordination disorder and stereotypic movement disorder are also classified as motor disorders. ICD-10
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 [Gilles de la Tourette]
F95.8  Other tic disorders
F95.9  Tic disorder, unspecified

Diagnosis
Tics should be distinguished from other causes of tourettism, stereotypies, chorea, dyskinesias, myoclonus and obsessive-compulsive disorder. Treatment
Education, and a "watch and wait" strategy, are the only treatment needed for many, and the majority of individuals with tics do not seek treatment. When needed, management of tic disorders is similar to management of Tourette syndrome. Epidemiology
Tic disorders are more commonly diagnosed in males than females.At least one in five children experience some form of tic disorder, most frequently between the ages of seven and twelve.
Provisional tic disorder approximately replaced transient tic disorder: because initially presenting tics may eventually be diagnosed as chronic tic disorder or Tourettes, transient suggested it could only be defined in retrospect (though that perception did not follow the DSM-IV-TR definition). The term provisional "satisfies experts with a more systematic epidemiological approach to disorders", but should not imply that treatment might not be called for. Differentiation of chronic motor or vocal tic disorder: DSM-5 added a specifier to distinguish between vocal and motor tics that are chronic. This distinction was added because higher rates of comorbid diagnoses are present with vocal tics relative to motor tics. Now includes as Tourettes Disorder patients with tics who experienced a 3-month or longer remission since the first tic, as long as the first tic was at least a year ago. Stimulant use as a cause removed: there is no evidence that the use of stimulants causes tic disorders. New categories, Other specified and Unspecified: for tic disorders that result in significant impairment to the individual yet do not meet the full criteria for other tic disorders. The new categories account for tics with onset in adulthood, or tics triggered by other medical conditions or illicit drug use. References
External links

The Tourette Syndrome Classification Study Group. "Definitions and classification of tic disorders". Arch Neurol. 1993 Oct;50(10):1013-6. PMID 8215958. Retrieved on 2005-03-22
Walkup JT, Ferrão Y, Leckman JF, Stein DJ, Singer H. Tic disorders: some key issues for DSM-V (PDF). Depress Anxiety. 2010 Jun;27(6):600–10. PMID 20533370 doi:10.1002/da.20711