ICD-10-CM · Chapter 13 · M00-M99
M40 Kyphosis and lordosis
Excludes 1 (cannot be coded together)
- congenital kyphosis and lordosis (Q76.4)
- kyphoscoliosis (M41.-)
- postprocedural kyphosis and lordosis (M96.-)
Code First
- underlying disease
Subcodes
Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.
| Code | Description | Billable |
|---|---|---|
| M40..0 | Postural kyphosis | No |
| M40..00 | Postural kyphosis, site unspecified | Yes |
| M40..03 | Postural kyphosis, cervicothoracic region | Yes |
| M40..04 | Postural kyphosis, thoracic region | Yes |
| M40..05 | Postural kyphosis, thoracolumbar region | Yes |
| M40..1 | Other secondary kyphosis | No |
| M40..10 | Other secondary kyphosis, site unspecified | Yes |
| M40..12 | Other secondary kyphosis, cervical region | Yes |
| M40..13 | Other secondary kyphosis, cervicothoracic region | Yes |
| M40..14 | Other secondary kyphosis, thoracic region | Yes |
| M40..15 | Other secondary kyphosis, thoracolumbar region | Yes |
| M40..2 | Other and unspecified kyphosis | No |
| M40..20 | Unspecified kyphosis | No |
| M40..202 | Unspecified kyphosis, cervical region | Yes |
| M40..203 | Unspecified kyphosis, cervicothoracic region | Yes |
| M40..204 | Unspecified kyphosis, thoracic region | Yes |
| M40..205 | Unspecified kyphosis, thoracolumbar region | Yes |
| M40..209 | Unspecified kyphosis, site unspecified | Yes |
| M40..29 | Other kyphosis | No |
| M40..292 | Other kyphosis, cervical region | Yes |
| M40..293 | Other kyphosis, cervicothoracic region | Yes |
| M40..294 | Other kyphosis, thoracic region | Yes |
| M40..295 | Other kyphosis, thoracolumbar region | Yes |
| M40..299 | Other kyphosis, site unspecified | Yes |
| M40..3 | Flatback syndrome | No |
| M40..30 | Flatback syndrome, site unspecified | Yes |
| M40..35 | Flatback syndrome, thoracolumbar region | Yes |
| M40..36 | Flatback syndrome, lumbar region | Yes |
| M40..37 | Flatback syndrome, lumbosacral region | Yes |
| M40..4 | Postural lordosis | No |
| M40..40 | Postural lordosis, site unspecified | Yes |
| M40..45 | Postural lordosis, thoracolumbar region | Yes |
| M40..46 | Postural lordosis, lumbar region | Yes |
| M40..47 | Postural lordosis, lumbosacral region | Yes |
| M40..5 | Lordosis, unspecified | No |
| M40..50 | Lordosis, unspecified, site unspecified | Yes |
| M40..55 | Lordosis, unspecified, thoracolumbar region | Yes |
| M40..56 | Lordosis, unspecified, lumbar region | Yes |
| M40..57 | Lordosis, unspecified, lumbosacral region | Yes |
Plain-language term for this code
The following entry in the US Medical Glossary corresponds to ICD-10-CM category M40:
- Kyphosis — Cifosis
Last reviewed: September 2026