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

Other dorsopathies
(M50-M54)

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

M50 Cervical disc disorders

Incl.:
cervical disc disorders with cervicalgia
cervicothoracic disc disorders
M50.0† Cervical disc disorder with myelopathy (G99.2*)
Guidance
M50.1 Cervical disc disorder with radiculopathy
Excl.:
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

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

M53 Other dorsopathies, not elsewhere classified

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

M54 Dorsalgia

Modifier-Hint
[See site code before M40]
Excl.:
psychogenic dorsalgia ( F45.4)
M54.0 Panniculitis affecting regions of neck and back
Excl.:
panniculitis:
M54.1 Radiculopathy
Incl.:
Neuritis or radiculitis:
  • brachial NOS
  • lumbar NOS
  • lumbosacral NOS
  • thoracic NOS
Radiculitis NOS
Excl.:
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
Excl.:
cervicalgia due to intervertebral cervical disc disorder ( M50.-)
M54.3 Sciatica
Excl.:
lesion of sciatic nerve ( G57.0)
sciatica:
  • due to intervertebral disc disorder (M51.1)
  • with lumbago (M54.4)
M54.4 Lumbago with sciatica
Excl.:
due to intervertebral disc disorder ( M51.1)
M54.5 Low back pain
Guidance
Incl.:
Loin pain
Low back strain
Lumbago NOS
Excl.:
lumbago:
  • due to intervertebral disc displacement (M51.2)
  • with sciatica (M54.4)
M54.6 Pain in thoracic spine
Excl.:
pain due to intervertebral disc disorder ( M51.-)
M54.8 Other dorsalgia
M54.9 Dorsalgia, unspecified
Incl.:
Backache NOS