F95 — Tic disorders

What is this category?

F95 covers involuntary, rapid, recurrent, non-rhythmic motor movements or vocalizations, sudden in onset and serving no apparent purpose. Tics are experienced as irresistible but can usually be suppressed voluntarily for varying lengths of time, are exacerbated by stress, and characteristically diminish during absorbing activities and disappear during sleep.

Core diagnostic concept

F95 requires involuntary, sudden, rapid, non-rhythmic movements or vocalizations; the fourth character is then decided by duration (less than 12 months versus 12 months or more) and by type (motor tics only, vocal tics only, or both motor and multiple vocal tics together, as in Tourette syndrome) — never by severity, social impact, or the presence of any particular vocal content.

Key diagnostic features

Involuntary

Tics are not wilful, attention-seeking, or a form of defiance — they are experienced as involuntary, though they can often be suppressed briefly with effort.

Sudden, rapid, non-rhythmic

Tics are abrupt and brief, unlike the more rhythmic, sustained repetitive movements seen in a stereotyped movement disorder (F98.4).

Fluctuating with context

Tics are typically exacerbated by stress or excitement, diminish during focused, absorbing activity, and disappear during sleep.

Duration and type decide the fourth character

Whether the tics have lasted less than 12 months or 12 months or more, and whether they are motor-only, vocal-only, or combined multiple-motor-and-vocal, together decide which fourth character applies.

How to weigh evidence

These learning labels are teaching aids, not official ICD-10 terminology (see Sources and Method).

• supports A 9-year-old has had frequent, involuntary eye-blinking and shoulder-shrugging for the past 18 months, alongside occasional involuntary throat-clearing sounds, both worsening with exam stress and absent during sleep.
• consistent not decisive A child is described as having 'nervous habits' with no further detail on duration, type, or involuntariness.
• raises alternative A repetitive, rhythmic hand-flapping movement that the child appears to perform deliberately for self-soothing, without the sudden, non-rhythmic quality of a tic.
• contradicts or weakens The movements are voluntary, can be stopped at will without effort, and the child reports doing them on purpose to feel a specific sensation.
• missing and necessary to ask How long the tics have been present, whether both motor and vocal tics are involved, and whether the movements are genuinely involuntary.

Duration and course

Minimum duration: No minimum is required for F95.0 (transient); F95.1 and F95.2 both require the tics to have persisted for 12 months or more.

Course: Tics characteristically wax and wane, worsen with stress, and are absent during sleep — this fluctuating course is itself a normal feature of tics, not evidence against the diagnosis.

Included presentations

• Involuntary, sudden, rapid, non-rhythmic motor movements or vocalizations, varying by duration and by whether motor, vocal, or both types are present.

Exclusions and distinguishing presentations

Four-character subtypes (orientation)

The fourth character is decided by duration and by whether motor, vocal, or both types of tic are present — never by severity, social visibility, or whether any vocal tic includes swearing (coprolalia), which is not required for and does not by itself indicate F95.2.

F95.0 — Transient tic disorder

Motor and/or vocal tics present for less than 12 months. (in_depth)

F95.1 — Chronic motor or vocal tic disorder

Either motor tics or vocal tics (not both), present for 12 months or more. (in_depth)

F95.2 — Combined vocal and multiple motor tic disorder [de la Tourette]

Both multiple motor tics and one or more vocal tics together, present for 12 months or more — Tourette syndrome. Coprolalia (involuntary swearing) affects only a minority of people with this condition and is not required for the diagnosis. (in_depth)

F95.8 — Other tic disorders

A tic disorder not fitting the other listed states. (taught for orientation only, not separately assessed in this pilot)

F95.9 — Tic disorder, unspecified

Insufficient information to specify further. (taught for orientation only, not separately assessed in this pilot)

Common learner errors

• Common mistake: Believing Tourette syndrome requires involuntary swearing (coprolalia)

Worked example — motor tics only, or combined?

A 10-year-old has had frequent, involuntary eye-blinking and facial grimacing for 14 months. Over the past 3 months, he has also developed an involuntary throat-clearing sound that occurs multiple times a day. Both are worse when he is anxious and absent while he sleeps.

1. Step 1 — Check involuntariness and character: the movements and sound are sudden, non-rhythmic, and involuntary, worse with stress and absent in sleep — consistent with tics generally.
2. Step 2 — Check duration: the motor tics have been present for 14 months, meeting the 12-month threshold for a chronic (not transient) tic disorder.
3. Step 3 — Check type: both motor tics (blinking, grimacing) and a vocal tic (throat-clearing) are now present together.
4. Conclusion — Combined motor and vocal tics present for 12 months or more support F95.2 (combined vocal and multiple motor tic disorder), not F95.0 or F95.1.

Interactive practice

• Type A Motor and vocal tics together, no swearing Recognition · Foundational
• Type B Rocking at bedtime Boundary discrimination · Intermediate

Retrieval prompts

Try answering each of these from memory before revealing where to check. Nothing you think or type here is sent or saved anywhere.

1. Name the two factors that decide F95's fourth character.

   Reveal answer location

   Check Duration and course, Diagnostic boundary, or the rapid revision card below — the cue you need is one of those, in this category's own already-authored wording.

   I recalled this I need to review this

2. Explain why coprolalia is not required for a Tourette syndrome (F95.2) diagnosis.

   Reveal answer location

   Check Duration and course, Diagnostic boundary, or the rapid revision card below — the cue you need is one of those, in this category's own already-authored wording.

   I recalled this I need to review this

These self-checks are a personal study aid only, visible to you on this page for this visit — they are not stored and do not affect your mastery dimensions.

Related glossary terms

• Tic

  An involuntary, sudden, rapid, recurrent, non-rhythmic motor movement or vocalization, serving no apparent purpose. Tics can usually be suppressed briefly with effort, are exacerbated by stress, and disappear during sleep.

  Open full glossary entry →