Attachment Difficulties
Attachment Difficulties: ICD-11 Features in Early Childhood
ICD-11 frames Attachment Difficulties as Reactive Attachment Disorder (6B44) and Disinhibited Social Engagement Disorder (6B45), both presupposing grossly inadequate early care. 6B44 features inhibited, withdrawn behaviour and failure to seek comfort, evident before age 5 with a developmental age of at least 9 months, not better explained by autism.
A young child's earliest relationships are the scaffolding for regulation, exploration and trust — and when that scaffolding is disrupted, the clinical picture is distinctive.
In short
Attachment Difficulties in ICD-11 are captured under two distinct disorders associated with grossly insufficient or pathogenic early care: Reactive Attachment Disorder (6B44) and Disinhibited Social Engagement Disorder (6B45). Both presuppose a history of inadequate caregiving — neglect, repeated changes of primary carer, or institutional rearing — and emerge in early childhood once a child is developmentally capable of selective attachment (typically after ~9 months developmental age). They are not synonymous with autism or intellectual disability, though differential clarity matters.The clinical picture
Reactive Attachment Disorder (6B44) presents as markedly inhibited, emotionally withdrawn behaviour toward caregivers: the child rarely seeks or responds to comfort when distressed, shows minimal social-emotional reciprocity, and displays unexplained irritability, sadness or fearfulness during ordinary, non-threatening interactions.Disinhibited Social Engagement Disorder (6B45), by contrast, shows overly familiar, culturally inappropriate approach to unfamiliar adults, reduced checking back with the carer, and willingness to go off with a stranger.
For a 6B44 diagnosis, the disturbance must be evident before age 5, the child must have a developmental age of at least 9 months, and features must not be better explained by autism spectrum disorder.
The Pinnacle way
A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care — never from an online tool. Our clinician-administered AbilityScore® profiles social-emotional functioning alongside behavioural and developmental therapy pathways. See the Attachment Difficulties overview for referral guidance.Trusted sources
WHO ICD-11 Mortality and Morbidity Statistics (6B44, 6B45); American Academy of Pediatrics guidance on early relational health.Next step — Refer a child with a pathogenic-care history and atypical attachment behaviours to a Pinnacle centre for structured assessment.
This is general information, not a diagnosis — a clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre under qualified clinician care.
What to watch
A history of pathogenic care plus a child who rarely seeks comfort when distressed, shows minimal social-emotional reciprocity, or — conversely — approaches unfamiliar adults indiscriminately. Confirm developmental age ≥9 months and rule out autism spectrum disorder before attributing features to attachment.
Try this at home
When taking a history, ask specifically about continuity of primary caregivers and any periods of neglect or institutional care — this context is what distinguishes an attachment disorder from a primary neurodevelopmental difference.
Trusted sources
Developed by SETU Consortium · Pinnacle Blooms Network · Last reviewed 2026-06-10 · reviewed every 365 days
This is general information, not a diagnosis. A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care.
Frequently asked
How does ICD-11 distinguish Reactive Attachment Disorder from Disinhibited Social Engagement Disorder?
Both require a history of grossly insufficient care, but 6B44 (Reactive Attachment Disorder) is characterised by inhibited, emotionally withdrawn behaviour and failure to seek or respond to comfort, whereas 6B45 (Disinhibited Social Engagement Disorder) features overly familiar, indiscriminate approach to unfamiliar adults with reduced reticence.
At what age can Attachment Difficulties be diagnosed?
A child must have a developmental age of at least 9 months — the point at which selective attachment normally forms — and for Reactive Attachment Disorder the disturbance must be evident before age 5.
How is this differentiated from autism spectrum disorder?
Attachment disorders require a documented history of pathogenic care and the social-emotional features must not be better explained by autism. Autism shows pervasive social-communication differences and restricted, repetitive behaviours independent of caregiving history.