ICD-10-CM Book 2026 Edition

Chapters  /  Chapter 5  /  F70-F79

Intellectual Disabilities (F70-F79)

Code first: any associated physical or developmental disorders
Excludes1: borderline intellectual functioning, IQ above 70 to 84 (R41.83)
F70 Mild intellectual disabilities
IQ level 50-55 to approximately 70
Mild mental subnormality
F71 Moderate intellectual disabilities
IQ level 35-40 to 50-55
Moderate mental subnormality
F72 Severe intellectual disabilities
IQ 20-25 to 35-40
Severe mental subnormality
F73 Profound intellectual disabilities
IQ level below 20-25
Profound mental subnormality
F78 Other intellectual disabilities
F78.A Other genetic related intellectual disabilities
F78.A1 SYNGAP1-related intellectual disability
CodeAlso , if applicable, any associated:
autism spectrum disorder (F84.0)
autistic disorder (F84.0)
encephalopathy (G93.4-)
epilepsy and recurrent seizures (G40.-)
other pervasive developmental disorders (F84.8)
pervasive developmental disorder, NOS (F84.9)
F78.A9 Other genetic related intellectual disability
CodeAlso , if applicable, any associated disorders
F79 Unspecified intellectual disabilities
Mental deficiency NOS
Mental subnormality NOS