M40-M43Not billable, use a more specific code below
Deforming dorsopathies (M40-M43)
chapter 13: Diseases of the Musculoskeletal System and Connective Tissue
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Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers site and laterality, acute injury versus chronic musculoskeletal conditions, 7th characters for pathologic fractures, osteoporosis with or without current fracture, and multisystem inflammatory syndrome.
- Site and laterality (page 60)
- Acute traumatic versus chronic or recurrent musculoskeletal conditions (page 61)
- Coding of Pathologic Fractures (page 61)
- Osteoporosis (page 61)
- Multisystem Inflammatory Syndrome (page 62)
All codes under M40-M43
M40-M43 can't be used on a claim. Pick a billable code below; grey headings group them.
- M40Kyphosis and lordosis
- M40.0Postural kyphosis
- M40.00Postural kyphosis, site unspecified
- M40.03Postural kyphosis, cervicothoracic region
- M40.04Postural kyphosis, thoracic region
- M40.05Postural kyphosis, thoracolumbar region
- M40.1Other secondary kyphosis
- M40.10Other secondary kyphosis, site unspecified
- M40.12Other secondary kyphosis, cervical region
- M40.13Other secondary kyphosis, cervicothoracic region
- M40.14Other secondary kyphosis, thoracic region
- M40.15Other secondary kyphosis, thoracolumbar region
- M40.2Other and unspecified kyphosis
- M40.20Unspecified kyphosis
- M40.202Unspecified kyphosis, cervical region
- M40.203Unspecified kyphosis, cervicothoracic region
- M40.204Unspecified kyphosis, thoracic region
- M40.205Unspecified kyphosis, thoracolumbar region
- M40.209Unspecified kyphosis, site unspecified
- M40.29Other kyphosis
- M40.292Other kyphosis, cervical region
- M40.293Other kyphosis, cervicothoracic region
- M40.294Other kyphosis, thoracic region
- M40.295Other kyphosis, thoracolumbar region
- M40.299Other kyphosis, site unspecified
- M40.3Flatback syndrome
- M40.30Flatback syndrome, site unspecified
- M40.35Flatback syndrome, thoracolumbar region
- M40.36Flatback syndrome, lumbar region
- M40.37Flatback syndrome, lumbosacral region
- M40.4Postural lordosis
- M40.40Postural lordosis, site unspecified
- M40.45Postural lordosis, thoracolumbar region
- M40.46Postural lordosis, lumbar region
- M40.47Postural lordosis, lumbosacral region
- M40.5Lordosis, unspecified
- M40.50Lordosis, unspecified, site unspecified
- M40.55Lordosis, unspecified, thoracolumbar region
- M40.56Lordosis, unspecified, lumbar region
- M40.57Lordosis, unspecified, lumbosacral region
- M41Scoliosis
- M41.0Infantile idiopathic scoliosis
- M41.00Infantile idiopathic scoliosis, site unspecified
- M41.02Infantile idiopathic scoliosis, cervical region
- M41.03Infantile idiopathic scoliosis, cervicothoracic region
- M41.04Infantile idiopathic scoliosis, thoracic region
- M41.05Infantile idiopathic scoliosis, thoracolumbar region
- M41.06Infantile idiopathic scoliosis, lumbar region
- M41.07Infantile idiopathic scoliosis, lumbosacral region
- M41.08Infantile idiopathic scoliosis, sacral and sacrococcygeal region
- M41.1Juvenile and adolescent idiopathic scoliosis
- M41.11Juvenile idiopathic scoliosis
- M41.112Juvenile idiopathic scoliosis, cervical region
- M41.113Juvenile idiopathic scoliosis, cervicothoracic region
- M41.114Juvenile idiopathic scoliosis, thoracic region
- M41.115Juvenile idiopathic scoliosis, thoracolumbar region
- M41.116Juvenile idiopathic scoliosis, lumbar region
- M41.117Juvenile idiopathic scoliosis, lumbosacral region
- M41.119Juvenile idiopathic scoliosis, site unspecified
- M41.12Adolescent idiopathic scoliosis
- M41.122Adolescent idiopathic scoliosis, cervical region
- M41.123Adolescent idiopathic scoliosis, cervicothoracic region
- M41.124Adolescent idiopathic scoliosis, thoracic region
- M41.125Adolescent idiopathic scoliosis, thoracolumbar region
- M41.126Adolescent idiopathic scoliosis, lumbar region
- M41.127Adolescent idiopathic scoliosis, lumbosacral region
- M41.129Adolescent idiopathic scoliosis, site unspecified
- M41.2Other idiopathic scoliosis
- M41.20Other idiopathic scoliosis, site unspecified
- M41.22Other idiopathic scoliosis, cervical region
- M41.23Other idiopathic scoliosis, cervicothoracic region
- M41.24Other idiopathic scoliosis, thoracic region
- M41.25Other idiopathic scoliosis, thoracolumbar region
- M41.26Other idiopathic scoliosis, lumbar region
- M41.27Other idiopathic scoliosis, lumbosacral region
- M41.3Thoracogenic scoliosis
- M41.30Thoracogenic scoliosis, site unspecified
- M41.34Thoracogenic scoliosis, thoracic region
- M41.35Thoracogenic scoliosis, thoracolumbar region
- M41.4Neuromuscular scoliosis
- M41.40Neuromuscular scoliosis, site unspecified
- M41.41Neuromuscular scoliosis, occipito-atlanto-axial region
- M41.42Neuromuscular scoliosis, cervical region
- M41.43Neuromuscular scoliosis, cervicothoracic region
- M41.44Neuromuscular scoliosis, thoracic region
- M41.45Neuromuscular scoliosis, thoracolumbar region
- M41.46Neuromuscular scoliosis, lumbar region
- M41.47Neuromuscular scoliosis, lumbosacral region
- M41.5Other secondary scoliosis
- M41.50Other secondary scoliosis, site unspecified
- M41.52Other secondary scoliosis, cervical region
- M41.53Other secondary scoliosis, cervicothoracic region
- M41.54Other secondary scoliosis, thoracic region
- M41.55Other secondary scoliosis, thoracolumbar region
- M41.56Other secondary scoliosis, lumbar region
- M41.57Other secondary scoliosis, lumbosacral region
- M41.8Other forms of scoliosis
- M41.80Other forms of scoliosis, site unspecified
- M41.82Other forms of scoliosis, cervical region
- M41.83Other forms of scoliosis, cervicothoracic region
- M41.84Other forms of scoliosis, thoracic region
- M41.85Other forms of scoliosis, thoracolumbar region
- M41.86Other forms of scoliosis, lumbar region
- M41.87Other forms of scoliosis, lumbosacral region
- M41.9Scoliosis, unspecified
- M42Spinal osteochondrosis
- M42.0Juvenile osteochondrosis of spine
- M42.00Juvenile osteochondrosis of spine, site unspecified
- M42.01Juvenile osteochondrosis of spine, occipito-atlanto-axial region
- M42.02Juvenile osteochondrosis of spine, cervical region
- M42.03Juvenile osteochondrosis of spine, cervicothoracic region
- M42.04Juvenile osteochondrosis of spine, thoracic region
- M42.05Juvenile osteochondrosis of spine, thoracolumbar region
- M42.06Juvenile osteochondrosis of spine, lumbar region
- M42.07Juvenile osteochondrosis of spine, lumbosacral region
- M42.08Juvenile osteochondrosis of spine, sacral and sacrococcygeal region
- M42.09Juvenile osteochondrosis of spine, multiple sites in spine
- M42.1Adult osteochondrosis of spine
- M42.10Adult osteochondrosis of spine, site unspecified
- M42.11Adult osteochondrosis of spine, occipito-atlanto-axial region
- M42.12Adult osteochondrosis of spine, cervical region
- M42.13Adult osteochondrosis of spine, cervicothoracic region
- M42.14Adult osteochondrosis of spine, thoracic region
- M42.15Adult osteochondrosis of spine, thoracolumbar region
- M42.16Adult osteochondrosis of spine, lumbar region
- M42.17Adult osteochondrosis of spine, lumbosacral region
- M42.18Adult osteochondrosis of spine, sacral and sacrococcygeal region
- M42.19Adult osteochondrosis of spine, multiple sites in spine
- M42.9Spinal osteochondrosis, unspecified
- M43Other deforming dorsopathies
- M43.0Spondylolysis
- M43.00Spondylolysis, site unspecified
- M43.01Spondylolysis, occipito-atlanto-axial region
- M43.02Spondylolysis, cervical region
- M43.03Spondylolysis, cervicothoracic region
- M43.04Spondylolysis, thoracic region
- M43.05Spondylolysis, thoracolumbar region
- M43.06Spondylolysis, lumbar region
- M43.07Spondylolysis, lumbosacral region
- M43.08Spondylolysis, sacral and sacrococcygeal region
- M43.09Spondylolysis, multiple sites in spine
- M43.1Spondylolisthesis
- M43.10Spondylolisthesis, site unspecified
- M43.11Spondylolisthesis, occipito-atlanto-axial region
- M43.12Spondylolisthesis, cervical region
- M43.13Spondylolisthesis, cervicothoracic region
- M43.14Spondylolisthesis, thoracic region
- M43.15Spondylolisthesis, thoracolumbar region
- M43.16Spondylolisthesis, lumbar region
- M43.17Spondylolisthesis, lumbosacral region
- M43.18Spondylolisthesis, sacral and sacrococcygeal region
- M43.19Spondylolisthesis, multiple sites in spine
- M43.2Fusion of spine
- M43.20Fusion of spine, site unspecified
- M43.21Fusion of spine, occipito-atlanto-axial region
- M43.22Fusion of spine, cervical region
- M43.23Fusion of spine, cervicothoracic region
- M43.24Fusion of spine, thoracic region
- M43.25Fusion of spine, thoracolumbar region
- M43.26Fusion of spine, lumbar region
- M43.27Fusion of spine, lumbosacral region
- M43.28Fusion of spine, sacral and sacrococcygeal region
- M43.3Recurrent atlantoaxial dislocation with myelopathy
- M43.4Other recurrent atlantoaxial dislocation
- M43.5Other recurrent vertebral dislocation
- M43.5XOther recurrent vertebral dislocation
- M43.5X2Other recurrent vertebral dislocation, cervical region
- M43.5X3Other recurrent vertebral dislocation, cervicothoracic region
- M43.5X4Other recurrent vertebral dislocation, thoracic region
- M43.5X5Other recurrent vertebral dislocation, thoracolumbar region
- M43.5X6Other recurrent vertebral dislocation, lumbar region
- M43.5X7Other recurrent vertebral dislocation, lumbosacral region
- M43.5X8Other recurrent vertebral dislocation, sacral and sacrococcygeal region
- M43.5X9Other recurrent vertebral dislocation, site unspecified
- M43.6Torticollis
- M43.8Other specified deforming dorsopathies
- M43.8XOther specified deforming dorsopathies
- M43.8X1Other specified deforming dorsopathies, occipito-atlanto-axial region
- M43.8X2Other specified deforming dorsopathies, cervical region
- M43.8X3Other specified deforming dorsopathies, cervicothoracic region
- M43.8X4Other specified deforming dorsopathies, thoracic region
- M43.8X5Other specified deforming dorsopathies, thoracolumbar region
- M43.8X6Other specified deforming dorsopathies, lumbar region
- M43.8X7Other specified deforming dorsopathies, lumbosacral region
- M43.8X8Other specified deforming dorsopathies, sacral and sacrococcygeal region
- M43.8X9Other specified deforming dorsopathies, site unspecified
- M43.9Deforming dorsopathy, unspecified
M40-M43 MS-DRGs
This code does not group to an MS-DRG as a principal diagnosis.
Other codes that refer to M40-M43
Notes on these codes point to M40-M43.
- M95 Excludes2: deforming dorsopathies (M40-M43)
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Spine Injuries and Disorders
Your backbone, or spine, is made up of 26 bone discs called vertebrae. The vertebrae protect your spinal cord and allow you to stand and bend. A number of problems can change the structure of the spine or damage the vertebrae and surrounding tissue. They include:
Read more about spine injuries and disorders on MedlinePlus