Table 1.
The ICD-9 classification of IDD
| CLASSIFICATION | ICD-9 CODE |
|---|---|
| Mild mental retardation | 317 |
| Moderate mental retardation | 3180 |
| Severe mental retardation | 3181 |
| Profound mental retardation | 3182 |
| Down syndrome | 7580 |
| Fragile X syndrome | 75983 |
| Prader-Willi syndrome | 75981 |
| Autosomal deletion syndrome | 7583 |
| Infantile autism | 2990 |
| Cerebral degeneration in child | 330 |
| Chromosomal anomalies | 758 |
| Infantile cerebral palsy | 343 |
| Maternal alcohol affecting newborn | 76071 |
| Developmental delay not otherwise specified | 3157 |
IDD—intellectual and developmental disabilities.