{"h1":"ICD-11 Classification for Attachment Difficulties","faq":[{"a":"Attachment difficulties are classified as 6B44 Reactive attachment disorder in ICD-11-MMS, within the grouping of disorders specifically associated with stress.","q":"What is the ICD-11 code for attachment difficulties?"},{"a":"6B44 Reactive attachment disorder describes a failure to seek or accept comfort from caregivers, whereas 6B45 Disinhibited social engagement disorder describes indiscriminate, overfamiliar approach to unfamiliar adults. Both arise in the context of pathogenic care.","q":"How does 6B44 differ from 6B45?"},{"a":"In reactive attachment disorder, social-emotional difficulties are tied to the caregiving context and a history of pathogenic care, and tend to improve with adequate care. In autism spectrum disorder, social-communication differences are pervasive across contexts and not explained by caregiving history.","q":"How is reactive attachment disorder distinguished from autism?"},{"a":"No. Diagnosis requires a developmental age of at least nine months, since selective attachment is not yet reliably established below this age.","q":"Is reactive attachment disorder diagnosed in infants under nine months?"}],"lang":"en","slug":"what-is-the-icd-11-classification-for-attachment-difficulties","title":"ICD-11 Classification for Attachment Difficulties (6B44)","entity":{"key":"attachment","kind":"condition","name":"Attachment Difficulties","slug":null},"lenses":[{"kind":"stakeholder","label":"Doctor","value":"doctor"},{"kind":"domain","label":"Emotional","value":"emotional"},{"kind":"intent","label":"Definition","value":"definition"},{"kind":"lifecycle","label":"Screen","value":"screen"},{"kind":"route","label":"Screen","value":"screen"},{"kind":"empowerment","label":"Early Clarity","value":"early_clarity"}],"parent":{"key":"conditions","label":"Conditions"},"related":[{"lang":"en","slug":"which-standardised-tools-are-used-to-assess-attachment-difficulties-in-early-childhood","title":"Standardised tools for assessing attachment difficulties"},{"lang":"en","slug":"what-is-developmental-trauma-and-what-are-its-icd-11-features-in-early-childhood","title":"What is Developmental Trauma, and what are its ICD-11 features in early childhood?"},{"lang":"en","slug":"what-are-the-known-contributing-factors-for-attachment-difficulties-in-early-childhood","title":"Contributing Factors for Attachment Difficulties"},{"lang":"en","slug":"what-is-attachment-difficulties-and-what-are-its-icd-11-features-in-early-childhood","title":"Attachment Difficulties: ICD-11 Features in Early Childhood"},{"lang":"en","slug":"what-is-the-snomed-ct-concept-for-attachment-difficulties","title":"SNOMED CT concept for Attachment Difficulties"},{"lang":"en","slug":"what-is-attachment-difficulties","title":"What is Attachment Difficulties?"}],"summary":"In ICD-11-MMS, attachment difficulties are classified as 6B44 Reactive attachment disorder, within disorders specifically associated with stress. It describes grossly abnormal attachment behaviour in early childhood arising from pathogenic care, distinct from 6B45 Disinhibited social engagement disorder and from autism spectrum disorder.","answer_md":"*A child who struggles to seek and accept comfort from a primary caregiver is signalling something the ICD-11 names precisely — and naming it correctly is the first step to helping.*\n\n## In short\nIn **ICD-11-MMS**, attachment difficulties are classified under **6B44 Reactive attachment disorder**, within the grouping of disorders specifically associated with stress. It describes grossly abnormal attachment behaviours in early childhood — a consistent failure to seek or respond to comfort from caregivers — arising in the context of pathogenic care such as social neglect, deprivation or repeated changes in primary caregiver. Its conceptual sibling, **6B45 Disinhibited social engagement disorder**, sits alongside it for the contrasting presentation of indiscriminate, overfamiliar social approach.\n\n## The classification, briefly\nReactive attachment disorder (6B44) is defined by markedly disturbed and developmentally inappropriate attachment behaviours: the child rarely turns to an attachment figure for comfort, support, nurturance or protection, and shows minimal social and emotional responsiveness to others, with limited positive affect and episodes of unexplained irritability, sadness or fearfulness during otherwise non-threatening interactions with caregivers. The diagnosis requires evidence of pathogenic care and that the child has a developmental age of at least nine months — below which selective attachment is not yet reliably established. It is distinguished from autism spectrum disorder, in which the social-communication differences are pervasive rather than care-context-dependent.\n\n## When to refer\nRefer when disturbed attachment behaviour persists despite an adequate caregiving environment, when there is a documented history of neglect, institutional care or disrupted placements, or when the differential includes autism spectrum disorder or intellectual developmental disorder. Early multidisciplinary assessment — developmental, relational and psychosocial — supports accurate differentiation and timely caregiver-focused intervention.\n\n## The Pinnacle way\nDevelopmental measurement supports care planning; diagnosis requires an appropriately qualified healthcare professional., under qualified clinician care — never from an online form. Our teams assess the child within the caregiving relationship, building a relational and developmental profile that informs targeted support. Explore [how the AbilityScore works](/ask/what-is-the-abilityscore-and-how-is-it-calculated), our [behavioural therapy services](/behavioural-therapy), and [begin with a developmental check](/).\n\n## Trusted sources\nWHO ICD-11 for Mortality and Morbidity Statistics, disorders specifically associated with stress; American Academy of Pediatrics guidance on early childhood mental health and attachment.\n\n**Next step —** If a child's attachment patterns concern you, [arrange a Pinnacle developmental assessment](/).\n\nThis is general information, not a diagnosis — individual assessment and diagnosis require an appropriately qualified healthcare professional.","canonical":"https://pinnacleblooms.org/ask/what-is-the-icd-11-classification-for-attachment-difficulties","editorial":{"reviewed_at":"2026-06-11T20:12:18.613642+00:00","reviewed_by":null,"developed_by":"SETU Consortium · Pinnacle Blooms Network"},"alternates":[{"href":"https://pinnacleblooms.org/ask/what-is-the-icd-11-classification-for-attachment-difficulties","lang":"en","indexable":true},{"href":"https://pinnacleblooms.org/ask/what-is-the-icd-11-classification-for-attachment-difficulties-te","lang":"te","indexable":true}],"dimensions":[{"key":"conditions","label":"Conditions"}],"meta_title":"ICD-11 6B44: Attachment Difficulties Explained","meta_robots":"index, follow, max-image-preview:large","everyday_tip":"When taking a history, ask specifically about caregiving stability — placements, separations and quality of early care — as pathogenic care is essential to the 6B44 diagnosis and helps separate it from autism spectrum presentations.","published_at":"2026-06-10T10:52:00.07543+00:00","reading_paths":[{"key":"understand","items":[{"lang":"en","slug":"what-is-attachment-difficulties-and-what-are-its-icd-11-features-in-early-childhood","title":"Attachment Difficulties: ICD-11 Features in Early 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