M45-M49Not billable, use a more specific code below
Spondylopathies (M45-M49)
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 M45-M49
M45-M49 can't be used on a claim. Pick a billable code below; grey headings group them.
- M45Ankylosing spondylitis
- M45.0Ankylosing spondylitis of multiple sites in spine
- M45.1Ankylosing spondylitis of occipito-atlanto-axial region
- M45.2Ankylosing spondylitis of cervical region
- M45.3Ankylosing spondylitis of cervicothoracic region
- M45.4Ankylosing spondylitis of thoracic region
- M45.5Ankylosing spondylitis of thoracolumbar region
- M45.6Ankylosing spondylitis lumbar region
- M45.7Ankylosing spondylitis of lumbosacral region
- M45.8Ankylosing spondylitis sacral and sacrococcygeal region
- M45.9Ankylosing spondylitis of unspecified sites in spine
- M45.ANon-radiographic axial spondyloarthritis
- M45.A0Non-radiographic axial spondyloarthritis of unspecified sites in spine
- M45.A1Non-radiographic axial spondyloarthritis of occipito-atlanto-axial region
- M45.A2Non-radiographic axial spondyloarthritis of cervical region
- M45.A3Non-radiographic axial spondyloarthritis of cervicothoracic region
- M45.A4Non-radiographic axial spondyloarthritis of thoracic region
- M45.A5Non-radiographic axial spondyloarthritis of thoracolumbar region
- M45.A6Non-radiographic axial spondyloarthritis of lumbar region
- M45.A7Non-radiographic axial spondyloarthritis of lumbosacral region
- M45.A8Non-radiographic axial spondyloarthritis of sacral and sacrococcygeal region
- M45.ABNon-radiographic axial spondyloarthritis of multiple sites in spine
- M46Other inflammatory spondylopathies
- M46.0Spinal enthesopathy
- M46.00Spinal enthesopathy, site unspecified
- M46.01Spinal enthesopathy, occipito-atlanto-axial region
- M46.02Spinal enthesopathy, cervical region
- M46.03Spinal enthesopathy, cervicothoracic region
- M46.04Spinal enthesopathy, thoracic region
- M46.05Spinal enthesopathy, thoracolumbar region
- M46.06Spinal enthesopathy, lumbar region
- M46.07Spinal enthesopathy, lumbosacral region
- M46.08Spinal enthesopathy, sacral and sacrococcygeal region
- M46.09Spinal enthesopathy, multiple sites in spine
- M46.1Sacroiliitis, not elsewhere classified
- M46.2Osteomyelitis of vertebra
- M46.20Osteomyelitis of vertebra, site unspecified
- M46.21Osteomyelitis of vertebra, occipito-atlanto-axial region
- M46.22Osteomyelitis of vertebra, cervical region
- M46.23Osteomyelitis of vertebra, cervicothoracic region
- M46.24Osteomyelitis of vertebra, thoracic region
- M46.25Osteomyelitis of vertebra, thoracolumbar region
- M46.26Osteomyelitis of vertebra, lumbar region
- M46.27Osteomyelitis of vertebra, lumbosacral region
- M46.28Osteomyelitis of vertebra, sacral and sacrococcygeal region
- M46.3Infection of intervertebral disc (pyogenic)
- M46.30Infection of intervertebral disc (pyogenic), site unspecified
- M46.31Infection of intervertebral disc (pyogenic), occipito-atlanto-axial region
- M46.32Infection of intervertebral disc (pyogenic), cervical region
- M46.33Infection of intervertebral disc (pyogenic), cervicothoracic region
- M46.34Infection of intervertebral disc (pyogenic), thoracic region
- M46.35Infection of intervertebral disc (pyogenic), thoracolumbar region
- M46.36Infection of intervertebral disc (pyogenic), lumbar region
- M46.37Infection of intervertebral disc (pyogenic), lumbosacral region
- M46.38Infection of intervertebral disc (pyogenic), sacral and sacrococcygeal region
- M46.39Infection of intervertebral disc (pyogenic), multiple sites in spine
- M46.4Discitis, unspecified
- M46.40Discitis, unspecified, site unspecified
- M46.41Discitis, unspecified, occipito-atlanto-axial region
- M46.42Discitis, unspecified, cervical region
- M46.43Discitis, unspecified, cervicothoracic region
- M46.44Discitis, unspecified, thoracic region
- M46.45Discitis, unspecified, thoracolumbar region
- M46.46Discitis, unspecified, lumbar region
- M46.47Discitis, unspecified, lumbosacral region
- M46.48Discitis, unspecified, sacral and sacrococcygeal region
- M46.49Discitis, unspecified, multiple sites in spine
- M46.5Other infective spondylopathies
- M46.50Other infective spondylopathies, site unspecified
- M46.51Other infective spondylopathies, occipito-atlanto-axial region
- M46.52Other infective spondylopathies, cervical region
- M46.53Other infective spondylopathies, cervicothoracic region
- M46.54Other infective spondylopathies, thoracic region
- M46.55Other infective spondylopathies, thoracolumbar region
- M46.56Other infective spondylopathies, lumbar region
- M46.57Other infective spondylopathies, lumbosacral region
- M46.58Other infective spondylopathies, sacral and sacrococcygeal region
- M46.59Other infective spondylopathies, multiple sites in spine
- M46.8Other specified inflammatory spondylopathies
- M46.80Other specified inflammatory spondylopathies, site unspecified
- M46.81Other specified inflammatory spondylopathies, occipito-atlanto-axial region
- M46.82Other specified inflammatory spondylopathies, cervical region
- M46.83Other specified inflammatory spondylopathies, cervicothoracic region
- M46.84Other specified inflammatory spondylopathies, thoracic region
- M46.85Other specified inflammatory spondylopathies, thoracolumbar region
- M46.86Other specified inflammatory spondylopathies, lumbar region
- M46.87Other specified inflammatory spondylopathies, lumbosacral region
- M46.88Other specified inflammatory spondylopathies, sacral and sacrococcygeal region
- M46.89Other specified inflammatory spondylopathies, multiple sites in spine
- M46.9Unspecified inflammatory spondylopathy
- M46.90Unspecified inflammatory spondylopathy, site unspecified
- M46.91Unspecified inflammatory spondylopathy, occipito-atlanto-axial region
- M46.92Unspecified inflammatory spondylopathy, cervical region
- M46.93Unspecified inflammatory spondylopathy, cervicothoracic region
- M46.94Unspecified inflammatory spondylopathy, thoracic region
- M46.95Unspecified inflammatory spondylopathy, thoracolumbar region
- M46.96Unspecified inflammatory spondylopathy, lumbar region
- M46.97Unspecified inflammatory spondylopathy, lumbosacral region
- M46.98Unspecified inflammatory spondylopathy, sacral and sacrococcygeal region
- M46.99Unspecified inflammatory spondylopathy, multiple sites in spine
- M47Spondylosis
- M47.0Anterior spinal and vertebral artery compression syndromes
- M47.01Anterior spinal artery compression syndromes
- M47.011Anterior spinal artery compression syndromes, occipito-atlanto-axial region
- M47.012Anterior spinal artery compression syndromes, cervical region
- M47.013Anterior spinal artery compression syndromes, cervicothoracic region
- M47.014Anterior spinal artery compression syndromes, thoracic region
- M47.015Anterior spinal artery compression syndromes, thoracolumbar region
- M47.016Anterior spinal artery compression syndromes, lumbar region
- M47.019Anterior spinal artery compression syndromes, site unspecified
- M47.02Vertebral artery compression syndromes
- M47.021Vertebral artery compression syndromes, occipito-atlanto-axial region
- M47.022Vertebral artery compression syndromes, cervical region
- M47.029Vertebral artery compression syndromes, site unspecified
- M47.1Other spondylosis with myelopathy
- M47.10Other spondylosis with myelopathy, site unspecified
- M47.11Other spondylosis with myelopathy, occipito-atlanto-axial region
- M47.12Other spondylosis with myelopathy, cervical region
- M47.13Other spondylosis with myelopathy, cervicothoracic region
- M47.14Other spondylosis with myelopathy, thoracic region
- M47.15Other spondylosis with myelopathy, thoracolumbar region
- M47.16Other spondylosis with myelopathy, lumbar region
- M47.2Other spondylosis with radiculopathy
- M47.20Other spondylosis with radiculopathy, site unspecified
- M47.21Other spondylosis with radiculopathy, occipito-atlanto-axial region
- M47.22Other spondylosis with radiculopathy, cervical region
- M47.23Other spondylosis with radiculopathy, cervicothoracic region
- M47.24Other spondylosis with radiculopathy, thoracic region
- M47.25Other spondylosis with radiculopathy, thoracolumbar region
- M47.26Other spondylosis with radiculopathy, lumbar region
- M47.27Other spondylosis with radiculopathy, lumbosacral region
- M47.28Other spondylosis with radiculopathy, sacral and sacrococcygeal region
- M47.8Other spondylosis
- M47.81Spondylosis without myelopathy or radiculopathy
- M47.811Spondylosis without myelopathy or radiculopathy, occipito-atlanto-axial region
- M47.812Spondylosis without myelopathy or radiculopathy, cervical region
- M47.813Spondylosis without myelopathy or radiculopathy, cervicothoracic region
- M47.814Spondylosis without myelopathy or radiculopathy, thoracic region
- M47.815Spondylosis without myelopathy or radiculopathy, thoracolumbar region
- M47.816Spondylosis without myelopathy or radiculopathy, lumbar region
- M47.817Spondylosis without myelopathy or radiculopathy, lumbosacral region
- M47.818Spondylosis without myelopathy or radiculopathy, sacral and sacrococcygeal region
- M47.819Spondylosis without myelopathy or radiculopathy, site unspecified
- M47.89Other spondylosis
- M47.891Other spondylosis, occipito-atlanto-axial region
- M47.892Other spondylosis, cervical region
- M47.893Other spondylosis, cervicothoracic region
- M47.894Other spondylosis, thoracic region
- M47.895Other spondylosis, thoracolumbar region
- M47.896Other spondylosis, lumbar region
- M47.897Other spondylosis, lumbosacral region
- M47.898Other spondylosis, sacral and sacrococcygeal region
- M47.899Other spondylosis, site unspecified
- M47.9Spondylosis, unspecified
- M48Other spondylopathies
- M48.0Spinal stenosis
- M48.00Spinal stenosis, site unspecified
- M48.01Spinal stenosis, occipito-atlanto-axial region
- M48.02Spinal stenosis, cervical region
- M48.03Spinal stenosis, cervicothoracic region
- M48.04Spinal stenosis, thoracic region
- M48.05Spinal stenosis, thoracolumbar region
- M48.06Spinal stenosis, lumbar region
- M48.061Spinal stenosis, lumbar region without neurogenic claudication
- M48.062Spinal stenosis, lumbar region with neurogenic claudication
- M48.07Spinal stenosis, lumbosacral region
- M48.08Spinal stenosis, sacral and sacrococcygeal region
- M48.1Ankylosing hyperostosis [Forestier]
- M48.10Ankylosing hyperostosis [Forestier], site unspecified
- M48.11Ankylosing hyperostosis [Forestier], occipito-atlanto-axial region
- M48.12Ankylosing hyperostosis [Forestier], cervical region
- M48.13Ankylosing hyperostosis [Forestier], cervicothoracic region
- M48.14Ankylosing hyperostosis [Forestier], thoracic region
- M48.15Ankylosing hyperostosis [Forestier], thoracolumbar region
- M48.16Ankylosing hyperostosis [Forestier], lumbar region
- M48.17Ankylosing hyperostosis [Forestier], lumbosacral region
- M48.18Ankylosing hyperostosis [Forestier], sacral and sacrococcygeal region
- M48.19Ankylosing hyperostosis [Forestier], multiple sites in spine
- M48.2Kissing spine
- M48.20Kissing spine, site unspecified
- M48.21Kissing spine, occipito-atlanto-axial region
- M48.22Kissing spine, cervical region
- M48.23Kissing spine, cervicothoracic region
- M48.24Kissing spine, thoracic region
- M48.25Kissing spine, thoracolumbar region
- M48.26Kissing spine, lumbar region
- M48.27Kissing spine, lumbosacral region
- M48.3Traumatic spondylopathy
- M48.30Traumatic spondylopathy, site unspecified
- M48.31Traumatic spondylopathy, occipito-atlanto-axial region
- M48.32Traumatic spondylopathy, cervical region
- M48.33Traumatic spondylopathy, cervicothoracic region
- M48.34Traumatic spondylopathy, thoracic region
- M48.35Traumatic spondylopathy, thoracolumbar region
- M48.36Traumatic spondylopathy, lumbar region
- M48.37Traumatic spondylopathy, lumbosacral region
- M48.38Traumatic spondylopathy, sacral and sacrococcygeal region
- M48.4Fatigue fracture of vertebra
- M48.40Fatigue fracture of vertebra, site unspecified
- M48.40XAFatigue fracture of vertebra, site unspecified, initial encounter for fracture
- M48.40XDFatigue fracture of vertebra, site unspecified, subsequent encounter for fracture with routine healing
- M48.40XGFatigue fracture of vertebra, site unspecified, subsequent encounter for fracture with delayed healing
- M48.40XSFatigue fracture of vertebra, site unspecified, sequela of fracture
- M48.41Fatigue fracture of vertebra, occipito-atlanto-axial region
- M48.41XAFatigue fracture of vertebra, occipito-atlanto-axial region, initial encounter for fracture
- M48.41XDFatigue fracture of vertebra, occipito-atlanto-axial region, subsequent encounter for fracture with routine healing
- M48.41XGFatigue fracture of vertebra, occipito-atlanto-axial region, subsequent encounter for fracture with delayed healing
- M48.41XSFatigue fracture of vertebra, occipito-atlanto-axial region, sequela of fracture
- M48.42Fatigue fracture of vertebra, cervical region
- M48.42XAFatigue fracture of vertebra, cervical region, initial encounter for fracture
- M48.42XDFatigue fracture of vertebra, cervical region, subsequent encounter for fracture with routine healing
- M48.42XGFatigue fracture of vertebra, cervical region, subsequent encounter for fracture with delayed healing
- M48.42XSFatigue fracture of vertebra, cervical region, sequela of fracture
- M48.43Fatigue fracture of vertebra, cervicothoracic region
- M48.43XAFatigue fracture of vertebra, cervicothoracic region, initial encounter for fracture
- M48.43XDFatigue fracture of vertebra, cervicothoracic region, subsequent encounter for fracture with routine healing
- M48.43XGFatigue fracture of vertebra, cervicothoracic region, subsequent encounter for fracture with delayed healing
- M48.43XSFatigue fracture of vertebra, cervicothoracic region, sequela of fracture
- M48.44Fatigue fracture of vertebra, thoracic region
- M48.44XAFatigue fracture of vertebra, thoracic region, initial encounter for fracture
- M48.44XDFatigue fracture of vertebra, thoracic region, subsequent encounter for fracture with routine healing
- M48.44XGFatigue fracture of vertebra, thoracic region, subsequent encounter for fracture with delayed healing
- M48.44XSFatigue fracture of vertebra, thoracic region, sequela of fracture
- M48.45Fatigue fracture of vertebra, thoracolumbar region
- M48.45XAFatigue fracture of vertebra, thoracolumbar region, initial encounter for fracture
- M48.45XDFatigue fracture of vertebra, thoracolumbar region, subsequent encounter for fracture with routine healing
- M48.45XGFatigue fracture of vertebra, thoracolumbar region, subsequent encounter for fracture with delayed healing
- M48.45XSFatigue fracture of vertebra, thoracolumbar region, sequela of fracture
- M48.46Fatigue fracture of vertebra, lumbar region
- M48.46XAFatigue fracture of vertebra, lumbar region, initial encounter for fracture
- M48.46XDFatigue fracture of vertebra, lumbar region, subsequent encounter for fracture with routine healing
- M48.46XGFatigue fracture of vertebra, lumbar region, subsequent encounter for fracture with delayed healing
- M48.46XSFatigue fracture of vertebra, lumbar region, sequela of fracture
- M48.47Fatigue fracture of vertebra, lumbosacral region
- M48.47XAFatigue fracture of vertebra, lumbosacral region, initial encounter for fracture
- M48.47XDFatigue fracture of vertebra, lumbosacral region, subsequent encounter for fracture with routine healing
- M48.47XGFatigue fracture of vertebra, lumbosacral region, subsequent encounter for fracture with delayed healing
- M48.47XSFatigue fracture of vertebra, lumbosacral region, sequela of fracture
- M48.48Fatigue fracture of vertebra, sacral and sacrococcygeal region
- M48.48XAFatigue fracture of vertebra, sacral and sacrococcygeal region, initial encounter for fracture
- M48.48XDFatigue fracture of vertebra, sacral and sacrococcygeal region, subsequent encounter for fracture with routine healing
- M48.48XGFatigue fracture of vertebra, sacral and sacrococcygeal region, subsequent encounter for fracture with delayed healing
- M48.48XSFatigue fracture of vertebra, sacral and sacrococcygeal region, sequela of fracture
- M48.5Collapsed vertebra, not elsewhere classified
- M48.50Collapsed vertebra, not elsewhere classified, site unspecified
- M48.50XACollapsed vertebra, not elsewhere classified, site unspecified, initial encounter for fracture
- M48.50XDCollapsed vertebra, not elsewhere classified, site unspecified, subsequent encounter for fracture with routine healing
- M48.50XGCollapsed vertebra, not elsewhere classified, site unspecified, subsequent encounter for fracture with delayed healing
- M48.50XSCollapsed vertebra, not elsewhere classified, site unspecified, sequela of fracture
- M48.51Collapsed vertebra, not elsewhere classified, occipito-atlanto-axial region
- M48.51XACollapsed vertebra, not elsewhere classified, occipito-atlanto-axial region, initial encounter for fracture
- M48.51XDCollapsed vertebra, not elsewhere classified, occipito-atlanto-axial region, subsequent encounter for fracture with routine healing
- M48.51XGCollapsed vertebra, not elsewhere classified, occipito-atlanto-axial region, subsequent encounter for fracture with delayed healing
- M48.51XSCollapsed vertebra, not elsewhere classified, occipito-atlanto-axial region, sequela of fracture
- M48.52Collapsed vertebra, not elsewhere classified, cervical region
- M48.52XACollapsed vertebra, not elsewhere classified, cervical region, initial encounter for fracture
- M48.52XDCollapsed vertebra, not elsewhere classified, cervical region, subsequent encounter for fracture with routine healing
- M48.52XGCollapsed vertebra, not elsewhere classified, cervical region, subsequent encounter for fracture with delayed healing
- M48.52XSCollapsed vertebra, not elsewhere classified, cervical region, sequela of fracture
- M48.53Collapsed vertebra, not elsewhere classified, cervicothoracic region
- M48.53XACollapsed vertebra, not elsewhere classified, cervicothoracic region, initial encounter for fracture
- M48.53XDCollapsed vertebra, not elsewhere classified, cervicothoracic region, subsequent encounter for fracture with routine healing
- M48.53XGCollapsed vertebra, not elsewhere classified, cervicothoracic region, subsequent encounter for fracture with delayed healing
- M48.53XSCollapsed vertebra, not elsewhere classified, cervicothoracic region, sequela of fracture
- M48.54Collapsed vertebra, not elsewhere classified, thoracic region
- M48.54XACollapsed vertebra, not elsewhere classified, thoracic region, initial encounter for fracture
- M48.54XDCollapsed vertebra, not elsewhere classified, thoracic region, subsequent encounter for fracture with routine healing
- M48.54XGCollapsed vertebra, not elsewhere classified, thoracic region, subsequent encounter for fracture with delayed healing
- M48.54XSCollapsed vertebra, not elsewhere classified, thoracic region, sequela of fracture
- M48.55Collapsed vertebra, not elsewhere classified, thoracolumbar region
- M48.55XACollapsed vertebra, not elsewhere classified, thoracolumbar region, initial encounter for fracture
- M48.55XDCollapsed vertebra, not elsewhere classified, thoracolumbar region, subsequent encounter for fracture with routine healing
- M48.55XGCollapsed vertebra, not elsewhere classified, thoracolumbar region, subsequent encounter for fracture with delayed healing
- M48.55XSCollapsed vertebra, not elsewhere classified, thoracolumbar region, sequela of fracture
- M48.56Collapsed vertebra, not elsewhere classified, lumbar region
- M48.56XACollapsed vertebra, not elsewhere classified, lumbar region, initial encounter for fracture
- M48.56XDCollapsed vertebra, not elsewhere classified, lumbar region, subsequent encounter for fracture with routine healing
- M48.56XGCollapsed vertebra, not elsewhere classified, lumbar region, subsequent encounter for fracture with delayed healing
- M48.56XSCollapsed vertebra, not elsewhere classified, lumbar region, sequela of fracture
- M48.57Collapsed vertebra, not elsewhere classified, lumbosacral region
- M48.57XACollapsed vertebra, not elsewhere classified, lumbosacral region, initial encounter for fracture
- M48.57XDCollapsed vertebra, not elsewhere classified, lumbosacral region, subsequent encounter for fracture with routine healing
- M48.57XGCollapsed vertebra, not elsewhere classified, lumbosacral region, subsequent encounter for fracture with delayed healing
- M48.57XSCollapsed vertebra, not elsewhere classified, lumbosacral region, sequela of fracture
- M48.58Collapsed vertebra, not elsewhere classified, sacral and sacrococcygeal region
- M48.58XACollapsed vertebra, not elsewhere classified, sacral and sacrococcygeal region, initial encounter for fracture
- M48.58XDCollapsed vertebra, not elsewhere classified, sacral and sacrococcygeal region, subsequent encounter for fracture with routine healing
- M48.58XGCollapsed vertebra, not elsewhere classified, sacral and sacrococcygeal region, subsequent encounter for fracture with delayed healing
- M48.58XSCollapsed vertebra, not elsewhere classified, sacral and sacrococcygeal region, sequela of fracture
- M48.8Other specified spondylopathies
- M48.8XOther specified spondylopathies
- M48.8X1Other specified spondylopathies, occipito-atlanto-axial region
- M48.8X2Other specified spondylopathies, cervical region
- M48.8X3Other specified spondylopathies, cervicothoracic region
- M48.8X4Other specified spondylopathies, thoracic region
- M48.8X5Other specified spondylopathies, thoracolumbar region
- M48.8X6Other specified spondylopathies, lumbar region
- M48.8X7Other specified spondylopathies, lumbosacral region
- M48.8X8Other specified spondylopathies, sacral and sacrococcygeal region
- M48.8X9Other specified spondylopathies, site unspecified
- M48.9Spondylopathy, unspecified
- M49Spondylopathies in diseases classified elsewhere
- M49.8Spondylopathy in diseases classified elsewhere
- M49.80Spondylopathy in diseases classified elsewhere, site unspecified
- M49.81Spondylopathy in diseases classified elsewhere, occipito-atlanto-axial region
- M49.82Spondylopathy in diseases classified elsewhere, cervical region
- M49.83Spondylopathy in diseases classified elsewhere, cervicothoracic region
- M49.84Spondylopathy in diseases classified elsewhere, thoracic region
- M49.85Spondylopathy in diseases classified elsewhere, thoracolumbar region
- M49.86Spondylopathy in diseases classified elsewhere, lumbar region
- M49.87Spondylopathy in diseases classified elsewhere, lumbosacral region
- M49.88Spondylopathy in diseases classified elsewhere, sacral and sacrococcygeal region
- M49.89Spondylopathy in diseases classified elsewhere, multiple sites in spine
M45-M49 MS-DRGs
This code does not group to an MS-DRG as a principal diagnosis.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Ankylosing Spondylitis
Ankylosing spondylitis (AS) is a type of arthritis of the spine. It causes inflammation (swelling) between your vertebrae (the bones that make up your spine) and the joints between your spine and pelvis. AS inflammation can cause stiffness and make it difficult to move and bend.
Read more about ankylosing spondylitis on MedlinePlus