Chapter XIII
Diseases of the musculoskeletal system and connective tissue
(M00-M99)

Rules Conventions GCS DChS.XIII.1 DChS.XIII.2

Dorsopathies
(M40-M54)

Modifiers

The following supplementary subclassification to indicate the site of involvement is provided for optional use with appropriate categories in the block on dorsopathies, except categories M50 and M51; see also note at the beginning of this chapter.

Code Title
0
Multiple sites in spine
1
Occipito-atlanto-axial region
2
Cervical region
3
Cervicothoracic region
4
Thoracic region
5
Thoracolumbar region
6
Lumbar region
7
Lumbosacral region
8
Sacral and sacrococcygeal region
9
Site unspecified

Spondylopathies
(M45-M49)

M45 Ankylosing spondylitis

Modifier-Hint
[See site code before M40]
Incl.:
Rheumatoid arthritis of spine
Excl.:
arthropathy in Reiter disease ( M02.3)
Behçet disease ( M35.2)
juvenile (ankylosing) spondylitis ( M08.1)

M46 Other inflammatory spondylopathies

Modifier-Hint
[See site code before M40]
M46.0 Spinal enthesopathy
Incl.:
Disorder of ligamentous or muscular attachments of spine
M46.1 Sacroiliitis, not elsewhere classified
M46.2 Osteomyelitis of vertebra
M46.3 Infection of intervertebral disc (pyogenic)
Coding-Hint
Use additional code (B95-B98), if desired, to identify infectious agent.
M46.4 Discitis, unspecified
M46.5 Other infective spondylopathies
M46.8 Other specified inflammatory spondylopathies
M46.9 Inflammatory spondylopathy, unspecified

M47 Spondylosis
DCS.XIII.2

Modifier-Hint
[See site code before M40]
Incl.:
arthrosis or osteoarthritis of spine
degeneration of facet joints
M47.0† Anterior spinal and vertebral artery compression syndromes (G99.2*)
M47.1 Other spondylosis with myelopathy
Incl.:
Spondylogenic compression of spinal cord† ( G99.2*)
Excl.:
vertebral subluxation ( M43.3-M43.5)
M47.2 Other spondylosis with radiculopathy
M47.8 Other spondylosis
Incl.:
  • Cervical spondylosis
  • Lumbosacral spondylosis
  • Thoracic spondylosis
  • without myelopathy or radiculopathy
M47.9 Spondylosis, unspecified

M48 Other spondylopathies

Modifier-Hint
[See site code before M40]
M48.0 Spinal stenosis
Incl.:
Caudal stenosis
M48.1 Ankylosing hyperostosis [Forestier]
Incl.:
Diffuse idiopathic skeletal hyperostosis [DISH]
M48.2 Kissing spine
M48.3 Traumatic spondylopathy
M48.4 Fatigue fracture of vertebra
Incl.:
Stress fracture of vertebra
M48.5 Collapsed vertebra, not elsewhere classified
Incl.:
Collapsed vertebra NOS
Wedging of vertebra NOS
Excl.:
collapsed vertebra in osteoporosis ( M80.-)
current injury - see injury of spine by body region.
M48.8 Other specified spondylopathies
Incl.:
Ossification of posterior longitudinal ligament
M48.9 Spondylopathy, unspecified

M49* Spondylopathies in diseases classified elsewhere

Modifier-Hint
[See site code before M40]
Excl.:
psoriatic and enteropathic arthropathies ( M07.-*, M09.-*)
M49.0* Tuberculosis of spine (A18.0†)
Incl.:
Pott curvature
M49.1* Brucella spondylitis (A23.-†)
M49.2* Enterobacterial spondylitis (A01-A04†)
M49.3* Spondylopathy in other infectious and parasitic diseases classified elsewhere
Excl.:
neuropathic spondylopathy in tabes dorsalis ( M49.4*)
M49.4* Neuropathic spondylopathy
Incl.:
Neuropathic spondylopathy in:
M49.5* Collapsed vertebra in diseases classified elsewhere
DCS.XIII.4
Incl.:
Metastatic fracture of vertebra ( C79.5†)
M49.8* Spondylopathy in other diseases classified elsewhere