Category · F90-F98 block
F93 — Emotional disorders with onset specific to childhood
What is this category?
F93 covers emotional disorders that are, for the most part, exaggerations of normal developmental trends rather than phenomena that are qualitatively abnormal in themselves — the same fears and worries appear, to some degree, in typical development, and the diagnostic question is one of degree, persistence, and functional impairment, not the mere presence of fear or worry.
Core diagnostic concept
F93 requires the specific fear, worry, or emotional reaction to be developmentally atypical in degree for the child's age, persistent (not a brief or passing phase), and associated with significant functional impairment — reusing this product's established 'ordinary experience versus disorder' reasoning pattern, first taught for F40-F48's adult neurotic disorders and now applied to childhood-specific presentations.
Key diagnostic features
- Developmentally atypical degree
- The fear, worry, or emotional reaction is markedly beyond what would be expected for the child's age and developmental stage, not merely present.
- Persistence
- The pattern continues over a meaningful period, not a brief or passing reaction to a specific, resolving event.
- Functional impairment
- The reaction significantly interferes with the child's everyday functioning — school attendance, sleep, family life, or peer relationships.
- Specific focus
- The particular focus of the emotional disturbance (separation, a specific feared object or situation, social settings, or a new sibling) determines which fourth character applies.
How to weigh evidence
These learning labels are teaching aids, not official ICD-10 terminology (see Sources and Method).
- supports An 8-year-old refuses to attend school, has recurrent nightmares about being separated from her mother, and develops physical complaints (stomachaches, headaches) every school morning, persisting for several months and significantly disrupting her schooling.
- consistent not decisive A young child is 'a bit clingy' with a parent, with no further detail on degree, persistence, or functional impairment.
- raises alternative A 2-year-old cries and clings to a parent when left with an unfamiliar caregiver, resolving within minutes and consistent with ordinary stranger and separation wariness at that age.
- contradicts or weakens The distress is confined to the first week after starting a new school and resolves fully as the child settles in, with no ongoing pattern.
- missing and necessary to ask How the reaction compares to what would be developmentally expected at this child's age, how long it has persisted, and how much it interferes with everyday functioning.
Diagnostic boundary
F93 is distinguished from ordinary developmental fears and separation wariness by degree, persistence, and functional impairment together — all three must be present, not merely the fear itself. It is distinguished from F91 by which feature is primary — internalizing distress in F93 versus externalizing rule-violating conduct in F91 — and from F94 by whether the presentation is a fear/worry-based emotional reaction (F93) or is instead rooted in the caregiving environment and social-functioning pattern itself (F94).
Full comparisons:
Duration and course
Minimum duration: The reaction must be persistent over a meaningful period, not a brief or passing phase tied to a specific, resolving event.
Course: Many childhood fears and separation anxieties are self-limiting and resolve with development and reassurance; F93 is reserved for when this does not happen and impairment continues.
Included presentations
- A developmentally atypical, persistent, functionally impairing emotional reaction focused on separation, a specific feared object or situation, social settings, or a new sibling.
Exclusions and distinguishing presentations
| If this is true instead… | Consider | Why |
|---|---|---|
| Separation distress or stranger wariness consistent with the child's developmental stage, resolving quickly | No specific code — see reasoning | Ordinary developmental fear and separation wariness, without atypical degree, persistence, or functional impairment, does not meet F93. |
| A social-functioning pattern rooted in the caregiving environment itself, such as elective mutism or an attachment disorder | F94 | When the presentation is primarily about social functioning shaped by the caregiving environment rather than a specific fear or worry, F94 is the more accurate classification. |
Four-character subtypes (orientation)
The fourth character records the specific focus of the emotional disturbance (separation, a feared object/situation, social settings, or a new sibling) — it does not indicate severity, and the presence of any one of these focuses does not by itself confirm the degree, persistence, and impairment F93 requires.
- F93.0 — Separation anxiety disorder of childhood
- Developmentally atypical, persistent, impairing anxiety about separation from an attachment figure, going beyond the separation anxiety normal for the child's developmental stage. (in_depth)
- F93.1 — Phobic anxiety disorder of childhood
- A developmentally atypical, persistent, impairing fear of a specific object or situation, going beyond fears that are a normal phase of development for the child's age. (in_depth)
- F93.2 — Social anxiety disorder of childhood
- A persistent, impairing wariness of strangers or new social situations, going beyond the wariness that is normal at the child's developmental stage, and interfering with peer relationships. (in_depth)
- F93.3 — Sibling rivalry disorder
- A persistent, impairing pattern of emotional disturbance following the birth of a younger sibling, going beyond the ordinary jealousy or rivalry common at this life event. (in_depth)
- F93.8 — Other childhood emotional disorders
- A childhood emotional disorder not fitting the other listed states. (taught for orientation only, not separately assessed in this pilot)
- F93.9 — Childhood emotional disorder, unspecified
- Insufficient information to specify further. (taught for orientation only, not separately assessed in this pilot)
Common learner errors
Worked example — ordinary wariness, or a disorder?
An 18-month-old cries and reaches for her father when a new babysitter arrives, calms within a few minutes once her father stays nearby briefly, and plays normally with the babysitter for the rest of the evening.
- Step 1 — Check degree and developmental stage: stranger and separation wariness around this age is a normal, expected developmental phase, not itself abnormal.
- Step 2 — Check persistence and impairment: the distress resolves within minutes and does not disrupt the rest of the evening.
- Step 3 — Weigh what this means: F93 requires the reaction to be developmentally atypical in degree, persistent, and functionally impairing — none of which is shown here.
- Conclusion — This is ordinary developmental separation wariness, not F93.
Interactive practice
- Type A Refusing school, months on Recognition · Foundational
- Type B Crying for a few minutes with a new babysitter 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.
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Name the three elements required together for F93 (beyond the fear itself).
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.
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Explain why ordinary stranger wariness in a toddler does not meet F93.
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.
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.
Rapid revision card
F93: A developmentally atypical, persistent, functionally impairing fear or worry — degree, persistence, and impairment must all be present together, not just the fear itself.
Decisive boundary cues:
- Resolves quickly, consistent with developmental stage -> weighs against F93.
- Persistent, disproportionate, and functionally impairing -> weighs toward F93.
- Primarily rooted in the caregiving environment/social functioning itself -> weighs toward F94 instead.
Duration/course: Persistence over a meaningful period, not a brief reaction to a specific resolving event, is required.
Nearest alternatives: F94, F91
Common mistake: Treating any childhood fear or separation distress as evidence of a disorder without checking degree, persistence, and functional impairment.
Retrieval prompt: How would you check whether this fear is developmentally typical or atypical for this child's age?
(or use your browser's print function) Open full-page printable revision view →
Related glossary terms
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Separation anxiety
Anxiety about separation from an attachment figure. A normal, expected feature of early childhood development; it becomes a disorder (F93.0) only when it is markedly atypical in degree for the child's developmental stage, persistent, and associated with significant functional impairment.
Source basis
WHO ICD-10 international classification structure and code/title (ICD-10 Browser, 2019 English release).
Original educational synthesis, informed by general published clinical-education understanding of ICD-10 F90-F98; no verbatim CDDG or DCR text is reproduced. See Sources and Method for the full policy.
Last reviewed: 2026-09-17. Full policy: Sources and Method.
Educational resource only. This page and its cases teach ICD-10 classification reasoning using fictional scenarios. It does not diagnose real people and should not be used to assess yourself or anyone else. If you are concerned about a child's development, behaviour, or emotional wellbeing, please speak with a qualified professional for assessment and support.