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

Deforming dorsopathies
(M40-M43)

M40 Kyphosis and lordosis

Modifier-Hint
[See site code before M40]
Excl.:
kyphoscoliosis ( M41.-)
kyphosis and lordosis:
M40.0 Postural kyphosis
Excl.:
osteochondrosis of spine ( M42.-)
M40.1 Other secondary kyphosis
M40.2 Other and unspecified kyphosis
M40.3 Flatback syndrome
M40.4 Other lordosis
Incl.:
Lordosis:
  • acquired
  • postural
M40.5 Lordosis, unspecified

M41 Scoliosis

Modifier-Hint
[See site code before M40]
Incl.:
kyphoscoliosis
Excl.:
congenital scoliosis:
kyphoscoliotic heart disease ( I27.1)
postprocedural ( M96.-)
M41.0 Infantile idiopathic scoliosis
M41.1 Juvenile idiopathic scoliosis
Incl.:
Adolescent scoliosis
M41.2 Other idiopathic scoliosis
M41.3 Thoracogenic scoliosis
M41.4 Neuromuscular scoliosis
Additional Text

Scoliosis secondary to cerebral palsy, Friedreich ataxia, poliomyelitis, and other neuromuscular disorders.

M41.5 Other secondary scoliosis
M41.8 Other forms of scoliosis
M41.9 Scoliosis, unspecified

M42 Spinal osteochondrosis

Modifier-Hint
[See site code before M40]
Excl.:
postural kyphosis ( M40.0)
M42.0 Juvenile osteochondrosis of spine
Incl.:
Calvé disease
Scheuermann disease
Excl.:
postural kyphosis ( M40.0)
M42.1 Adult osteochondrosis of spine
M42.9 Spinal osteochondrosis, unspecified

M43 Other deforming dorsopathies

Modifier-Hint
[See site code before M40]
Excl.:
congenital spondylolysis and spondylolisthesis ( Q76.2)
hemivertebra ( Q76.3-Q76.4)
Klippel-Feil syndrome ( Q76.1)
lumbarization and sacralization ( Q76.4)
platyspondylisis ( Q76.4)
spina bifida occulta ( Q76.0)
spinal curvature in:
  • osteoporosis (M80-M81)
  • Paget disease of bone [osteitis deformans] (M88.-)
M43.0 Spondylolysis
M43.1 Spondylolisthesis
M43.2 Other fusion of spine
Incl.:
Ankylosis of spinal joint
Excl.:
ankylosing spondylitis ( M45)
arthrodesis status ( Z98.1)
pseudoarthrosis after fusion or arthrodesis ( M96.0)
M43.3 Recurrent atlantoaxial subluxation with myelopathy
M43.4 Other recurrent atlantoaxial subluxation
M43.5 Other recurrent vertebral subluxation
Excl.:
biomechanical lesions NEC ( M99.-)
M43.6 Torticollis
Excl.:
torticollis:
  • congenital (sternomastoid) (Q68.0)
  • current injury - see injury of spine by body region
  • due to birth injury (P15.2)
  • psychogenic (F45.8)
  • spasmodic (G24.3)
M43.8 Other specified deforming dorsopathies
Excl.:
kyphosis and lordosis ( M40.-)
scoliosis ( M41.-)
M43.9 Deforming dorsopathy, unspecified
Incl.:
Curvature of spine NOS