ICD-10-CM Section · M40-M43
Deforming dorsopathies
187 codes in this section
187
Total Codes
157
Billable
30
Header (Non-Billable)
4
Top-Level Codes
About Section M40-M43
Section M40-M43 (M40-M43) covers deforming dorsopathies. It sits within the Diseases of the musculoskeletal system and connective tissue chapter (M00-M99). This section contains 187 ICD-10-CM codes, 157 billable diagnoses you can submit on a claim, and 30 non-billable header codes used to organize the hierarchy.
Codes are organized below by 3-character root. Click the root to see all subcodes underneath it, or click any individual code for full coverage data, payer policies, and linked CPT procedures.
Codes in M40-M43
Grouped by 3-character root code. Click any code for full detail.
M40
Kyphosis and lordosis
39 subcodes
| M40.0 | Postural kyphosis | Header |
| M40.00 | Postural kyphosis, site unspecified | Billable |
| M40.03 | Postural kyphosis, cervicothoracic region | Billable |
| M40.04 | Postural kyphosis, thoracic region | Billable |
| M40.05 | Postural kyphosis, thoracolumbar region | Billable |
| M40.1 | Other secondary kyphosis | Header |
| M40.10 | Other secondary kyphosis, site unspecified | Billable |
| M40.12 | Other secondary kyphosis, cervical region | Billable |
| M40.13 | Other secondary kyphosis, cervicothoracic region | Billable |
| M40.14 | Other secondary kyphosis, thoracic region | Billable |
| M40.15 | Other secondary kyphosis, thoracolumbar region | Billable |
| M40.2 | Other and unspecified kyphosis | Header |
| M40.20 | Unspecified kyphosis | Header |
| M40.202 | Unspecified kyphosis, cervical region | Billable |
| M40.203 | Unspecified kyphosis, cervicothoracic region | Billable |
| M40.204 | Unspecified kyphosis, thoracic region | Billable |
| M40.205 | Unspecified kyphosis, thoracolumbar region | Billable |
| M40.209 | Unspecified kyphosis, site unspecified | Billable |
| M40.29 | Other kyphosis | Header |
| M40.292 | Other kyphosis, cervical region | Billable |
| M40.293 | Other kyphosis, cervicothoracic region | Billable |
| M40.294 | Other kyphosis, thoracic region | Billable |
| M40.295 | Other kyphosis, thoracolumbar region | Billable |
| M40.299 | Other kyphosis, site unspecified | Billable |
| M40.3 | Flatback syndrome | Header |
| M40.30 | Flatback syndrome, site unspecified | Billable |
| M40.35 | Flatback syndrome, thoracolumbar region | Billable |
| M40.36 | Flatback syndrome, lumbar region | Billable |
| M40.37 | Flatback syndrome, lumbosacral region | Billable |
| M40.4 | Postural lordosis | Header |
| M40.40 | Postural lordosis, site unspecified | Billable |
| M40.45 | Postural lordosis, thoracolumbar region | Billable |
| M40.46 | Postural lordosis, lumbar region | Billable |
| M40.47 | Postural lordosis, lumbosacral region | Billable |
| M40.5 | Lordosis, unspecified | Header |
| M40.50 | Lordosis, unspecified, site unspecified | Billable |
| M40.55 | Lordosis, unspecified, thoracolumbar region | Billable |
| M40.56 | Lordosis, unspecified, lumbar region | Billable |
| M40.57 | Lordosis, unspecified, lumbosacral region | Billable |
M41
Scoliosis
64 subcodes
| M41.0 | Infantile idiopathic scoliosis | Header |
| M41.00 | Infantile idiopathic scoliosis, site unspecified | Billable |
| M41.02 | Infantile idiopathic scoliosis, cervical region | Billable |
| M41.03 | Infantile idiopathic scoliosis, cervicothoracic region | Billable |
| M41.04 | Infantile idiopathic scoliosis, thoracic region | Billable |
| M41.05 | Infantile idiopathic scoliosis, thoracolumbar region | Billable |
| M41.06 | Infantile idiopathic scoliosis, lumbar region | Billable |
| M41.07 | Infantile idiopathic scoliosis, lumbosacral region | Billable |
| M41.08 | Infantile idiopathic scoliosis, sacral and sacrococcygeal region | Billable |
| M41.1 | Juvenile and adolescent idiopathic scoliosis | Header |
| M41.11 | Juvenile idiopathic scoliosis | Header |
| M41.112 | Juvenile idiopathic scoliosis, cervical region | Billable |
| M41.113 | Juvenile idiopathic scoliosis, cervicothoracic region | Billable |
| M41.114 | Juvenile idiopathic scoliosis, thoracic region | Billable |
| M41.115 | Juvenile idiopathic scoliosis, thoracolumbar region | Billable |
| M41.116 | Juvenile idiopathic scoliosis, lumbar region | Billable |
| M41.117 | Juvenile idiopathic scoliosis, lumbosacral region | Billable |
| M41.119 | Juvenile idiopathic scoliosis, site unspecified | Billable |
| M41.12 | Adolescent idiopathic scoliosis | Header |
| M41.122 | Adolescent idiopathic scoliosis, cervical region | Billable |
| M41.123 | Adolescent idiopathic scoliosis, cervicothoracic region | Billable |
| M41.124 | Adolescent idiopathic scoliosis, thoracic region | Billable |
| M41.125 | Adolescent idiopathic scoliosis, thoracolumbar region | Billable |
| M41.126 | Adolescent idiopathic scoliosis, lumbar region | Billable |
| M41.127 | Adolescent idiopathic scoliosis, lumbosacral region | Billable |
| M41.129 | Adolescent idiopathic scoliosis, site unspecified | Billable |
| M41.2 | Other idiopathic scoliosis | Header |
| M41.20 | Other idiopathic scoliosis, site unspecified | Billable |
| M41.22 | Other idiopathic scoliosis, cervical region | Billable |
| M41.23 | Other idiopathic scoliosis, cervicothoracic region | Billable |
| M41.24 | Other idiopathic scoliosis, thoracic region | Billable |
| M41.25 | Other idiopathic scoliosis, thoracolumbar region | Billable |
| M41.26 | Other idiopathic scoliosis, lumbar region | Billable |
| M41.27 | Other idiopathic scoliosis, lumbosacral region | Billable |
| M41.3 | Thoracogenic scoliosis | Header |
| M41.30 | Thoracogenic scoliosis, site unspecified | Billable |
| M41.34 | Thoracogenic scoliosis, thoracic region | Billable |
| M41.35 | Thoracogenic scoliosis, thoracolumbar region | Billable |
| M41.4 | Neuromuscular scoliosis | Header |
| M41.40 | Neuromuscular scoliosis, site unspecified | Billable |
| M41.41 | Neuromuscular scoliosis, occipito-atlanto-axial region | Billable |
| M41.42 | Neuromuscular scoliosis, cervical region | Billable |
| M41.43 | Neuromuscular scoliosis, cervicothoracic region | Billable |
| M41.44 | Neuromuscular scoliosis, thoracic region | Billable |
| M41.45 | Neuromuscular scoliosis, thoracolumbar region | Billable |
| M41.46 | Neuromuscular scoliosis, lumbar region | Billable |
| M41.47 | Neuromuscular scoliosis, lumbosacral region | Billable |
| M41.5 | Other secondary scoliosis | Header |
| M41.50 | Other secondary scoliosis, site unspecified | Billable |
| M41.52 | Other secondary scoliosis, cervical region | Billable |
| M41.53 | Other secondary scoliosis, cervicothoracic region | Billable |
| M41.54 | Other secondary scoliosis, thoracic region | Billable |
| M41.55 | Other secondary scoliosis, thoracolumbar region | Billable |
| M41.56 | Other secondary scoliosis, lumbar region | Billable |
| M41.57 | Other secondary scoliosis, lumbosacral region | Billable |
| M41.8 | Other forms of scoliosis | Header |
| M41.80 | Other forms of scoliosis, site unspecified | Billable |
| M41.82 | Other forms of scoliosis, cervical region | Billable |
| M41.83 | Other forms of scoliosis, cervicothoracic region | Billable |
| M41.84 | Other forms of scoliosis, thoracic region | Billable |
| M41.85 | Other forms of scoliosis, thoracolumbar region | Billable |
| M41.86 | Other forms of scoliosis, lumbar region | Billable |
| M41.87 | Other forms of scoliosis, lumbosacral region | Billable |
| M41.9 | Scoliosis, unspecified | Billable |
M42
Spinal osteochondrosis
23 subcodes
| M42.0 | Juvenile osteochondrosis of spine | Header |
| M42.00 | Juvenile osteochondrosis of spine, site unspecified | Billable |
| M42.01 | Juvenile osteochondrosis of spine, occipito-atlanto-axial region | Billable |
| M42.02 | Juvenile osteochondrosis of spine, cervical region | Billable |
| M42.03 | Juvenile osteochondrosis of spine, cervicothoracic region | Billable |
| M42.04 | Juvenile osteochondrosis of spine, thoracic region | Billable |
| M42.05 | Juvenile osteochondrosis of spine, thoracolumbar region | Billable |
| M42.06 | Juvenile osteochondrosis of spine, lumbar region | Billable |
| M42.07 | Juvenile osteochondrosis of spine, lumbosacral region | Billable |
| M42.08 | Juvenile osteochondrosis of spine, sacral and sacrococcygeal region | Billable |
| M42.09 | Juvenile osteochondrosis of spine, multiple sites in spine | Billable |
| M42.1 | Adult osteochondrosis of spine | Header |
| M42.10 | Adult osteochondrosis of spine, site unspecified | Billable |
| M42.11 | Adult osteochondrosis of spine, occipito-atlanto-axial region | Billable |
| M42.12 | Adult osteochondrosis of spine, cervical region | Billable |
| M42.13 | Adult osteochondrosis of spine, cervicothoracic region | Billable |
| M42.14 | Adult osteochondrosis of spine, thoracic region | Billable |
| M42.15 | Adult osteochondrosis of spine, thoracolumbar region | Billable |
| M42.16 | Adult osteochondrosis of spine, lumbar region | Billable |
| M42.17 | Adult osteochondrosis of spine, lumbosacral region | Billable |
| M42.18 | Adult osteochondrosis of spine, sacral and sacrococcygeal region | Billable |
| M42.19 | Adult osteochondrosis of spine, multiple sites in spine | Billable |
| M42.9 | Spinal osteochondrosis, unspecified | Billable |
M43
Other deforming dorsopathies
57 subcodes
| M43.0 | Spondylolysis | Header |
| M43.00 | Spondylolysis, site unspecified | Billable |
| M43.01 | Spondylolysis, occipito-atlanto-axial region | Billable |
| M43.02 | Spondylolysis, cervical region | Billable |
| M43.03 | Spondylolysis, cervicothoracic region | Billable |
| M43.04 | Spondylolysis, thoracic region | Billable |
| M43.05 | Spondylolysis, thoracolumbar region | Billable |
| M43.06 | Spondylolysis, lumbar region | Billable |
| M43.07 | Spondylolysis, lumbosacral region | Billable |
| M43.08 | Spondylolysis, sacral and sacrococcygeal region | Billable |
| M43.09 | Spondylolysis, multiple sites in spine | Billable |
| M43.1 | Spondylolisthesis | Header |
| M43.10 | Spondylolisthesis, site unspecified | Billable |
| M43.11 | Spondylolisthesis, occipito-atlanto-axial region | Billable |
| M43.12 | Spondylolisthesis, cervical region | Billable |
| M43.13 | Spondylolisthesis, cervicothoracic region | Billable |
| M43.14 | Spondylolisthesis, thoracic region | Billable |
| M43.15 | Spondylolisthesis, thoracolumbar region | Billable |
| M43.16 | Spondylolisthesis, lumbar region | Billable |
| M43.17 | Spondylolisthesis, lumbosacral region | Billable |
| M43.18 | Spondylolisthesis, sacral and sacrococcygeal region | Billable |
| M43.19 | Spondylolisthesis, multiple sites in spine | Billable |
| M43.2 | Fusion of spine | Header |
| M43.20 | Fusion of spine, site unspecified | Billable |
| M43.21 | Fusion of spine, occipito-atlanto-axial region | Billable |
| M43.22 | Fusion of spine, cervical region | Billable |
| M43.23 | Fusion of spine, cervicothoracic region | Billable |
| M43.24 | Fusion of spine, thoracic region | Billable |
| M43.25 | Fusion of spine, thoracolumbar region | Billable |
| M43.26 | Fusion of spine, lumbar region | Billable |
| M43.27 | Fusion of spine, lumbosacral region | Billable |
| M43.28 | Fusion of spine, sacral and sacrococcygeal region | Billable |
| M43.3 | Recurrent atlantoaxial dislocation with myelopathy | Billable |
| M43.4 | Other recurrent atlantoaxial dislocation | Billable |
| M43.5 | Other recurrent vertebral dislocation | Header |
| M43.5X | Other recurrent vertebral dislocation | Header |
| M43.5X2 | Other recurrent vertebral dislocation, cervical region | Billable |
| M43.5X3 | Other recurrent vertebral dislocation, cervicothoracic region | Billable |
| M43.5X4 | Other recurrent vertebral dislocation, thoracic region | Billable |
| M43.5X5 | Other recurrent vertebral dislocation, thoracolumbar region | Billable |
| M43.5X6 | Other recurrent vertebral dislocation, lumbar region | Billable |
| M43.5X7 | Other recurrent vertebral dislocation, lumbosacral region | Billable |
| M43.5X8 | Other recurrent vertebral dislocation, sacral and sacrococcygeal region | Billable |
| M43.5X9 | Other recurrent vertebral dislocation, site unspecified | Billable |
| M43.6 | Torticollis | Billable |
| M43.8 | Other specified deforming dorsopathies | Header |
| M43.8X | Other specified deforming dorsopathies | Header |
| M43.8X1 | Other specified deforming dorsopathies, occipito-atlanto-axial region | Billable |
| M43.8X2 | Other specified deforming dorsopathies, cervical region | Billable |
| M43.8X3 | Other specified deforming dorsopathies, cervicothoracic region | Billable |
| M43.8X4 | Other specified deforming dorsopathies, thoracic region | Billable |
| M43.8X5 | Other specified deforming dorsopathies, thoracolumbar region | Billable |
| M43.8X6 | Other specified deforming dorsopathies, lumbar region | Billable |
| M43.8X7 | Other specified deforming dorsopathies, lumbosacral region | Billable |
| M43.8X8 | Other specified deforming dorsopathies, sacral and sacrococcygeal region | Billable |
| M43.8X9 | Other specified deforming dorsopathies, site unspecified | Billable |
| M43.9 | Deforming dorsopathy, unspecified | Billable |
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Verified against the CMS 2026 code set on May 31, 2026.
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