. Author manuscript; available in PMC: 2023 Sep 1.

Published in final edited form as: J Autism Dev Disord. 2021 Sep 28;52(9):4150–4163. doi: 10.1007/s10803-021-05269-1

Table 1.

ICD-9-CM and ICD-10-CM diagnosis codes for autism spectrum disorder diagnosis types

Condition	ICD-9-CM codes^a	ICD-10-CM codes^a
Autistic disorder	299.00, 299.01	F84.1
Childhood disintegrative disorder	299.10, 299.11	F84.3
Rett syndrome	330.8	F84.2
Asperger’s syndrome	299.80, 299.81	F84.5
Other pervasive developmental disorders	299.80, 299.81	F84.8
Pervasive developmental disorder, unspecified	299.90, 299.91	F84.9

ICD-9-CM International Classification of Diseases, Ninth Revision, Clinical Modifications, ICD-10-CM International Classification of Diseases, Tenth Revision, Clinical Modifications

ICD-9-CM recommended for use by US healthcare providers through September 30, 2015

ICD-10-CM recommended for use by US healthcare providers starting October 1, 2015

These codes are consistent with the definition of autism spectrum disorder in the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders