ICD-11 Codes
for 6A00 - Disorders of intellectual development

Teodor Jurukovski January 1, 1970

Fact checked by: Teodor Jurukovski

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Synonyms and Alternative Terms for Disorders of Intellectual Development

The ICD-11 classification uses the term Disorders of intellectual development (ICD-11 code 6A00) to describe a specific group of conditions. This terminology is also referred to as Intellectual developmental disorders (IDD) or Intellectual disability (ID). Historically, the term Mental Retardation (MR) was used. Understanding these terms is crucial for accurate medical coding and documentation, particularly when using the ICD-11 code for Disorders of intellectual development.

Clinical Overview of Disorders of Intellectual Development

Disorders of intellectual development, identified by the ICD-11 code 6A00, represent a range of conditions that originate during the developmental period. The core characteristics include significantly below-average intellectual functioning and adaptive behaviour, typically manifesting at least two standard deviations below the population mean. These impairments affect conceptual, social, and practical skills essential for daily living. ICD-11 categorises these disorders with specifiers for severity, such as mild, moderate, severe, profound, or provisional, allowing for a more nuanced understanding of an individual's needs.

Causes and Risk Factors for Disorders of Intellectual Development

The aetiology of Disorders of intellectual development (ICD-11 code 6A00) is diverse, stemming from a complex interplay of factors that interfere with brain development. Potential causes and risk factors include genetic alterations, abnormal neural circuit development, and issues arising during prenatal, perinatal, or early childhood periods. Other contributing factors can encompass infections, traumatic brain injuries, severe undernutrition, and significant psychosocial understimulation. Identifying the specific cause can be important for targeted interventions.

Diagnosis of Disorders of Intellectual Development

Diagnosing Disorders of intellectual development (ICD-11 code 6A00) involves a comprehensive assessment of both intellectual functioning and adaptive behaviour. This typically includes the use of appropriately normed, individually administered standardized tests. Where such tests are not available or fully applicable, clinical judgment plays a critical role. The diagnostic process aims to identify significant limitations in cognitive abilities, learning, and the ability to meet age-appropriate and culturally relevant demands of daily life.

Treatment and Management Considerations for Disorders of Intellectual Development

Management of Disorders of intellectual development (ICD-11 code 6A00) focuses on early intervention, providing appropriate support, and addressing co-occurring conditions. Co-morbidities, including other mental, behavioural, neurodevelopmental, physical, and sensory disorders, are common and often present atypically. Therefore, assessment and treatment plans must be highly individualised to ensure optimal care and support throughout an individual's lifespan. The goal is to enhance functioning and quality of life.

Documentation and Coding Considerations for Disorders of Intellectual Development

Accurate documentation and coding are essential for Disorders of intellectual development, classified under ICD-11 code 6A00. The primary code 6A00 is used, with specific sub-codes available to denote severity, such as 6A00.0 for mild, 6A00.1 for moderate, 6A00.2 for severe, 6A00.3 for profound, 6A00.4 for provisional, and 6A00.Z for unspecified. When known, the underlying aetiology and any co-occurring conditions should also be coded to provide a complete clinical picture for billing and reporting purposes. This ICD-11 code for intellectual developmental disorder is reportable and billable when applicable to patient care.