2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Mental Disorders 290-319 > Mental Retardation 317-319 > 2006 ICD-9-CM Diagnosis 319 Unspecified mental retardation View the most recent version of ICD-9-CM 319 Subnormal intellectual functioning which originates during the developmental period. This has multiple potential etiologies, including genetic defects and perinatal insults. Intelligence quotient (IQ) scores are commonly used to determine whether an individual is mentally retarded. IQ scores between 70 and 79 are in the borderline mentally retarded range. Scores below 67 are in the retarded range. 319 is a specific code that can be used to specify a diagnosis 319 contains 17 index entries Alternate Terminology Mental deficiency NOS Mental subnormality NOS  Index entries containing 319: Amentia (see also Retardation, mental) 319 Meynert's (nonalcoholic) 294.0 alcoholic 291.1 nevoid 759.6 Brain - see also condition syndrome (acute) (chronic) (nonpsychotic) (organic) (with neurotic reaction) (with behavioral reaction) (see also Syndrome, brain) 310.9 congenital (see also Retardation, mental) 319 Defect, defective 759.9 mental (see also Retardation, mental) 319 Deficiency, deficient mental (familial) (hereditary) (see also Retardation, mental) 319 Dementia 294.8 congenital (see also Retardation, mental) 319 Development tardy, mental (see also Retardation, mental) 319 Inadequate, inadequacy mental (see also Retardation, mental) 319 Insufficiency, insufficient mental (congenital) (see also Retardation, mental) 319 Mental - see also condition deficiency (see also Retardation, mental) 319 insufficiency (congenital) (see also Retardation, mental) 319 retardation (see also Retardation, mental) 319 subnormality (see also Retardation, mental) 319 mild 317 moderate 318.0 profound 318.2 severe 318.1 Oligergasia (see also Retardation, mental) 319 Oligophrenia (see also Retardation, mental) 319 phenylpyruvic 270.1 Retardation mental 319 borderline V62.89 mild, IQ 50-70 317 moderate, IQ 35-49 318.0 profound, IQ under 20 318.2 severe, IQ 20-34 318.1 Subnormal, subnormality mental (see also Retardation, mental) 319 mild 317 moderate 318.0 profound 318.2 severe 318.1 Syndrome - see also Disease brain (acute) (chronic) (nonpsychotic) (organic) (with behavioral reaction) (with neurotic reaction) 310.9 congenital (see also Retardation, mental) 319