DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

M43 Other deforming dorsopathies

  • Header · not billable

M43 is not billable. The category heads 50 billable codes in FY2027, grouped under 9 subdivisions.

Index → code

  • Spondylolisthesis (acquired) (degenerative)lumbar region → M43.16
  • Grisel's disease → M43.6
  • Spondylolysis (acquired) → M43.00

Where it sits

  1. Chapter 13 Diseases of the musculoskeletal system and connective tissue (M00-M99)
  2. M40-M43 Deforming dorsopathies (M40-M43)
  3. M43 Other deforming dorsopathies
Billable codes
50
Subdivisions
9
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
56

Codes in M43

  1. M43.0
    Spondylolysis
    Header
    Excludes1 2

    Excludes1

    • congenital spondylolysis (Q76.2) Q76.2
    • spondylolisthesis (M43.1) M43.1
  2. M43.00
    Spondylolysis, site unspecified
    Billable
  3. M43.01
    Spondylolysis, occipito-atlanto-axial region
    Billable
  4. M43.02
    Spondylolysis, cervical region
    Billable
  5. M43.03
    Spondylolysis, cervicothoracic region
    Billable
  6. M43.04
    Spondylolysis, thoracic region
    Billable
  7. M43.05
    Spondylolysis, thoracolumbar region
    Billable
  8. M43.06
    Spondylolysis, lumbar region
    Billable
  9. M43.07
    Spondylolysis, lumbosacral region
    Billable
  10. M43.08
    Spondylolysis, sacral and sacrococcygeal region
    Billable
  11. M43.09
    Spondylolysis, multiple sites in spine
    Billable
  12. M43.1
    Spondylolisthesis
    Header
    Excludes1 3

    Excludes1

    • acute traumatic of lumbosacral region (S33.1) S33.1
    • acute traumatic of sites other than lumbosacral- code to Fracture, vertebra, by region
    • congenital spondylolisthesis (Q76.2) Q76.2
  13. M43.10
    Spondylolisthesis, site unspecified
    Billable
  14. M43.11
    Spondylolisthesis, occipito-atlanto-axial region
    Billable
  15. M43.12
    Spondylolisthesis, cervical region
    Billable
  16. M43.13
    Spondylolisthesis, cervicothoracic region
    Billable
  17. M43.14
    Spondylolisthesis, thoracic region
    Billable
  18. M43.15
    Spondylolisthesis, thoracolumbar region
    Billable
  19. M43.16
    Spondylolisthesis, lumbar region
    Billable
  20. M43.17
    Spondylolisthesis, lumbosacral region
    Billable
  21. M43.18
    Spondylolisthesis, sacral and sacrococcygeal region
    Billable
  22. M43.19
    Spondylolisthesis, multiple sites in spine
    Billable
  23. M43.2
    Fusion of spine
    Header
    Inclusion terms 1, Excludes1 2, Excludes2 2

    Inclusion terms

    • Ankylosis of spinal joint

    Excludes1

    • ankylosing spondylitis (M45.0-) M45.0
    • congenital fusion of spine (Q76.4) Q76.4

    Excludes2

    • arthrodesis status (Z98.1) Z98.1
    • pseudoarthrosis after fusion or arthrodesis (M96.0) M96.0
  24. M43.20
    Fusion of spine, site unspecified
    Billable
  25. M43.21
    Fusion of spine, occipito-atlanto-axial region
    Billable
  26. M43.22
    Fusion of spine, cervical region
    Billable
  27. M43.23
    Fusion of spine, cervicothoracic region
    Billable
  28. M43.24
    Fusion of spine, thoracic region
    Billable
  29. M43.25
    Fusion of spine, thoracolumbar region
    Billable
  30. M43.26
    Fusion of spine, lumbar region
    Billable
  31. M43.27
    Fusion of spine, lumbosacral region
    Billable
  32. M43.28
    Fusion of spine, sacral and sacrococcygeal region
    Billable
  33. M43.3
    Recurrent atlantoaxial dislocation with myelopathy
    Billable
  34. M43.4
    Other recurrent atlantoaxial dislocation
    Billable
  35. M43.5
    Other recurrent vertebral dislocation
    Header
    Excludes1 1

    Excludes1

    • biomechanical lesions NEC (M99.-) M99
  36. M43.5X
    Other recurrent vertebral dislocation
    Header
  37. M43.5X2
    Other recurrent vertebral dislocation, cervical region
    Billable
  38. M43.5X3
    Other recurrent vertebral dislocation, cervicothoracic region
    Billable
  39. M43.5X4
    Other recurrent vertebral dislocation, thoracic region
    Billable
  40. M43.5X5
    Other recurrent vertebral dislocation, thoracolumbar region
    Billable
  41. M43.5X6
    Other recurrent vertebral dislocation, lumbar region
    Billable
  42. M43.5X7
    Other recurrent vertebral dislocation, lumbosacral region
    Billable
  43. M43.5X8
    Other recurrent vertebral dislocation, sacral and sacrococcygeal region
    Billable
  44. M43.5X9
    Other recurrent vertebral dislocation, site unspecified
    Billable
  45. M43.6
    Torticollis
    Billable
    Excludes1 6

    Excludes1

    • congenital (sternomastoid) torticollis (Q68.0) Q68.0
    • current injury - see Injury, of spine, by body region
    • ocular torticollis (R29.891) R29.891
    • psychogenic torticollis (F45.8) F45.8
    • spasmodic torticollis (G24.3) G24.3
    • torticollis due to birth injury (P15.2) P15.2
  46. M43.8
    Other specified deforming dorsopathies
    Header
    Excludes2 2

    Excludes2

    • kyphosis and lordosis (M40.-) M40
    • scoliosis (M41.-) M41
  47. M43.8X
    Other specified deforming dorsopathies
    Header
  48. M43.8X1
    Other specified deforming dorsopathies, occipito-atlanto-axial region
    Billable
  49. M43.8X2
    Other specified deforming dorsopathies, cervical region
    Billable
  50. M43.8X3
    Other specified deforming dorsopathies, cervicothoracic region
    Billable
  51. M43.8X4
    Other specified deforming dorsopathies, thoracic region
    Billable
  52. M43.8X5
    Other specified deforming dorsopathies, thoracolumbar region
    Billable
  53. M43.8X6
    Other specified deforming dorsopathies, lumbar region
    Billable
  54. M43.8X7
    Other specified deforming dorsopathies, lumbosacral region
    Billable
  55. M43.8X8
    Other specified deforming dorsopathies, sacral and sacrococcygeal region
    Billable
  56. M43.8X9
    Other specified deforming dorsopathies, site unspecified
    Billable
  57. M43.9
    Deforming dorsopathy, unspecified
    Billable
    Inclusion terms 1

    Inclusion terms

    • Curvature of spine NOS

Sources of each column.

Instructions

At M43

Excludes1

  • congenital spondylolysis and spondylolisthesis (Q76.2) Q76.2
  • hemivertebra (Q76.3-Q76.4) Q76.3 Q76.4
  • Klippel-Feil syndrome (Q76.1) Q76.1
  • lumbarization and sacralization (Q76.4) Q76.4
  • platyspondylisis (Q76.4) Q76.4
  • spina bifida occulta (Q76.0) Q76.0
  • spinal curvature in osteoporosis (M80.-) M80
  • spinal curvature in Paget's disease of bone [osteitis deformans] (M88.-) M88

Notes that also apply

Chapter 13 instructions (Notes 1, Excludes2 10): printed on the chapter 13 page.

Index entries

  • Spondylolysis (acquired) → M43.00
  • Spondylolisthesis (acquired) (degenerative) → M43.10
  • Grisel's disease → M43.6
  • Torticollis (intermittent) (spastic) → M43.6
  • Spondylolysis (acquired)occipito-atlanto-axial region → M43.01
  • Spondylolysis (acquired)cervical region → M43.02
  • Spondylolysis (acquired)cervicothoracic region → M43.03
  • Spondylolysis (acquired)thoracic region → M43.04
  • Spondylolysis (acquired)thoracolumbar region → M43.05
  • Spondylolysis (acquired)lumbar region → M43.06
  • Spondylolysis (acquired)lumbosacral region → M43.07
  • Spondylolysis (acquired)sacrococcygeal region → M43.08
  • Spondylolysis (acquired)multiple sites → M43.09
  • Spondylolisthesis (acquired) (degenerative)traumatic (old) → M43.10
  • Spondylolisthesis (acquired) (degenerative)occipito-atlanto-axial region → M43.11
  • Spondylolisthesis (acquired) (degenerative)cervical region → M43.12
  • Spondylolisthesis (acquired) (degenerative)cervicothoracic region → M43.13
  • Spondylolisthesis (acquired) (degenerative)thoracic region → M43.14
  • Spondylolisthesis (acquired) (degenerative)thoracolumbar region → M43.15
  • Spondylolisthesis (acquired) (degenerative)lumbar region → M43.16
  • Spondylolisthesis (acquired) (degenerative)lumbosacral region → M43.17
  • Spondylolisthesis (acquired) (degenerative)sacrococcygeal region → M43.18
  • Spondylolisthesis (acquired) (degenerative)multiple sites → M43.19
  • Fusion, fused (congenital)spine (acquired) NEC → M43.20
  • Fusion, fused (congenital)cervical spine → M43.22
  • Ankylosis (fibrous) (osseous) (joint)lumbosacral (joint) → M43.27
  • Fusion, fused (congenital)lumbosacral (acquired) → M43.27
  • Ankylosis (fibrous) (osseous) (joint)sacro-iliac (joint) → M43.28
  • Fusion, fused (congenital)sacroiliac (joint) (acquired) → M43.28
  • Subluxationatlantoaxial, recurrent → M43.4
  • Disease, diseasedGrisel's → M43.6
  • Nasopharyngealtorticollis → M43.6
  • Rheumatic (acute) (subacute)torticollis → M43.6
  • Torticollis (intermittent) (spastic)rheumatic → M43.6
  • Angulationsacrum (acquired) → M43.8
  • Deformitycoccyx (acquired) → M43.8
  • Deformitysacrum (acquired) → M43.8
  • Angulationcoccyx (acquired) → M43.8X8
  • Dorsopathydeforming → M43.9
  • Fusion, fused (congenital)spine (acquired) NECoccipito-atlanto-axial region → M43.21

16 more, longer entries are not listed; the search box finds them by word.

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