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M43.2

⚠ Non-billable (Header)

Fusion of spine

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

⚠️ This is a category header code — not billable. Use a more specific child code below.

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Also Known As

Ankylosis of spinal joint

❌ Excludes1

direct

Cannot be coded with M43.2

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

❌ Excludes1

inherited from M43

Rules from parent category M43: Other deforming dorsopathies

  • • 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.-)
  • • spinal curvature in Paget's disease of bone [osteitis deformans] (M88.-)

⚠️ Excludes2

direct

May be coded together if both conditions coexist

  • • arthrodesis status (Z98.1)
  • • pseudoarthrosis after fusion or arthrodesis (M96.0)

Child Codes (9)

M43.20Fusion of spine, site unspecifiedM43.21Fusion of spine, occipito-atlanto-axial regionM43.22Fusion of spine, cervical regionM43.23Fusion of spine, cervicothoracic regionM43.24Fusion of spine, thoracic regionM43.25Fusion of spine, thoracolumbar regionM43.26Fusion of spine, lumbar regionM43.27Fusion of spine, lumbosacral regionM43.28Fusion of spine, sacral and sacrococcygeal region

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Code Information

CodeM43.2
BillableNo — Header code
ParentM43
CategoryDiseases of the musculoskeletal system and connective tissue (M00-M99)
Excludes110 rule(s)
Excludes22 note(s)
Child codes9

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)