Chapter XIII

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

Dorsopathies
(M40-M54)


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.
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


Excludes:	current injury - see injury of spine by body region discitis NOS ( M46.4 )


M50	Cervical disc disorders
	Includes:	cervical disc disorders with cervicalgia cervicothoracic disc disorders
M50.0+	Cervical disc disorder with myelopathy ( G99.2* )
M50.1	Cervical disc disorder with radiculopathy
	Excludes:	brachial radiculitis NOS ( M54.1 )
M50.2	Other cervical disc displacement
M50.3	Other cervical disc degeneration
M50.8	Other cervical disc disorders
M50.9	Cervical disc disorder, unspecified


M51	Other intervertebral disc disorders
	Includes:	thoracic, thoracolumbar and lumbosacral disc disorders
M51.0+	Lumbar and other intervertebral disc disorders with myelopathy ( G99.2* )
M51.1+	Lumbar and other intervertebral disc disorders with radiculopathy (G55.1*)
	Sciatica due to intervertebral disc disorder
	Excludes:	lumbar radiculitis NOS ( M54.1 )
M51.2	Other specified intervertebral disc displacement
	Lumbago due to displacement of intervertebral disc
M51.3	Other specified intervertebral disc degeneration
M51.4	Schmorl's nodes
M51.8	Other specified intervertebral disc disorders
M51.9	Intervertebral disc disorder, unspecified


M53	Other dorsopathies, not elsewhere classified
	[See site code before M40 ]
M53.0	Cervicocranial syndrome
	Posterior cervical sympathetic syndrome
M53.1	Cervicobrachial syndrome
	Excludes:	cervical disc disorder ( M50.- ) thoracic outlet syndrome ( G54.0 )
M53.2	Spinal instabilities
M53.3	Sacrococcygeal disorders, not elsewhere classified
	Coccygodynia
M53.8	Other specified dorsopathies
M53.9	Dorsopathy, unspecified


M54	Dorsalgia
	[See site code before M40 ]
	Excludes:	psychogenic dorsalgia ( F45.4 )
M54.0	Panniculitis affecting regions of neck and back
	Excludes:	panniculitis: · NOS ( M79.3 ) · lupus ( L93.2 ) · relapsing [Weber-Christian] ( M35.6 )
M54.1	Radiculopathy
	Neuritis or radiculitis: · brachial NOS · lumbar NOS · lumbosacral NOS · thoracic NOS Radiculitis NOS
	Excludes:	neuralgia and neuritis NOS ( M79.2 ) radiculopathy with: · cervical disc disorder ( M50.1 ) · lumbar and other intervertebral disc disorder ( M51.1 ) · spondylosis ( M47.2 )
M54.2	Cervicalgia
	Excludes:	cervicalgia due to intervertebral cervical disc disorder ( M50.- )
M54.3	Sciatica
	Excludes:	lesion of sciatic nerve ( G57.0 ) sciatica: · due to intervertebral disc disorder ( M51.1 ) · with lumbago ( M54.4 )
M54.4	Lumbago with sciatica
	Excludes:	that due to intervertebral disc disorder ( M51.1 )
M54.5	Low back pain
	Loin pain Low back strain Lumbago NOS
	Excludes:	lumbago: · due to intervertebral disc displacement ( M51.2 ) · with sciatica ( M54.4 )
M54.6	Pain in thoracic spine
	Excludes:	pain due to intervertebral disc disorder ( M51.- )
M54.8	Other dorsalgia
M54.9	Dorsalgia, unspecified
	Backache NOS