Table 1.

Classification of Intellectual and Developmental Disabilities Using ICD-9^b Codes

Intellectual and developmental disabilities	ICD-9 codes	n by unique women (N = 498)
Mild Mental Retardation	317	175
Moderate Mental Retardation	318.0	a
Severe Mental Retardation	318.1	0
Profound Mental Retardation	318.2	0
Unspecified Mental Retardation	319	103
Fragile X Syndrome	759.83	a
Prader-Willi Syndrome	759.81	a
Down Syndrome	758.0	14
Rett Syndrome	330.8	0
Lesch Nyhan	277.2	a
Cri du Chat	758.31	0
Autistic Disorder	299.0, 299.01, 299.02	a
Childhood Disintegrative Disorder	299.1, 299.10, 299.11	0
Other Specified Pervasive Developmental Disorder	299.8, 299.80, 299.81	21
Unspecified Pervasive Developmental Disorder	299.9, 299.90, 299.91	a
Tuberous Sclerosis	759.5	12
Fetal Alcohol Syndrome	760.1	a
Cerebral Palsy Athetoid	333.71	0
Cerebral Palsy Diplegic	343.0	a
Cerebral Palsy Hemiplegic	343.1	a
Cerebral Palsy Quadriplegic	343.2	a
Cerebral Palsy Monoplegic	343.3	a
Cerebral Palsy Spastic	343.9	92
Other Cerebral Palsy	343.4, 343.8	a
Cerebral Palsy Spastic Non-Congenital Non-Infantile	344.89	18

^aNumbers < 11 suppressed to protect confidentiality.

^bInternational Statistical Classification of Diseases and Related Health Problems.