| M4036 | Flatback syndrome, lumbar region |
| M4037 | Flatback syndrome, lumbosacral region |
| M404 | Postural lordosis |
| M4040 | Postural lordosis, site unspecified |
| M4045 | Postural lordosis, thoracolumbar region |
| M4046 | Postural lordosis, lumbar region |
| M4047 | Postural lordosis, lumbosacral region |
| M405 | Lordosis, unspecified |
| M4050 | Lordosis, unspecified, site unspecified |
| M4055 | Lordosis, unspecified, thoracolumbar region |
| M4056 | Lordosis, unspecified, lumbar region |
| M4057 | Lordosis, unspecified, lumbosacral region |
| M41 | Scoliosis |
| M410 | Infantile idiopathic scoliosis |
| M4100 | Infantile idiopathic scoliosis, site unspecified |
| M4102 | Infantile idiopathic scoliosis, cervical region |
| M4103 | Infantile idiopathic scoliosis, cervicothoracic region |
| M4104 | Infantile idiopathic scoliosis, thoracic region |
| M4105 | Infantile idiopathic scoliosis, thoracolumbar region |
| M4106 | Infantile idiopathic scoliosis, lumbar region |
| M4107 | Infantile idiopathic scoliosis, lumbosacral region |
| M4108 | Infantile idiopathic scoliosis, sacral and sacrococcygeal region |
| M411 | Juvenile and adolescent idiopathic scoliosis |
| M4111 | Juvenile idiopathic scoliosis |
| M41112 | Juvenile idiopathic scoliosis, cervical region |
| M41113 | Juvenile idiopathic scoliosis, cervicothoracic region |
| M41114 | Juvenile idiopathic scoliosis, thoracic region |
| M41115 | Juvenile idiopathic scoliosis, thoracolumbar region |
| M41116 | Juvenile idiopathic scoliosis, lumbar region |
| M41117 | Juvenile idiopathic scoliosis, lumbosacral region |
| M41119 | Juvenile idiopathic scoliosis, site unspecified |
| M4112 | Adolescent idiopathic scoliosis |
| M41122 | Adolescent idiopathic scoliosis, cervical region |
| M41123 | Adolescent idiopathic scoliosis, cervicothoracic region |
| M41124 | Adolescent idiopathic scoliosis, thoracic region |
| M41125 | Adolescent idiopathic scoliosis, thoracolumbar region |
| M41126 | Adolescent idiopathic scoliosis, lumbar region |
| M41127 | Adolescent idiopathic scoliosis, lumbosacral region |
| M41129 | Adolescent idiopathic scoliosis, site unspecified |
| M412 | Other idiopathic scoliosis |
| M4120 | Other idiopathic scoliosis, site unspecified |
| M4122 | Other idiopathic scoliosis, cervical region |
| M4123 | Other idiopathic scoliosis, cervicothoracic region |
| M4124 | Other idiopathic scoliosis, thoracic region |
| M4125 | Other idiopathic scoliosis, thoracolumbar region |
| M4126 | Other idiopathic scoliosis, lumbar region |
| M4127 | Other idiopathic scoliosis, lumbosacral region |
| M413 | Thoracogenic scoliosis |
| M4130 | Thoracogenic scoliosis, site unspecified |
| M4134 | Thoracogenic scoliosis, thoracic region |