ICD-10-CM 2027 diagnosis code
M43Other deforming dorsopathies
M43 is a header code, so it can't be reported by itself. Choose one of the 9 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About M43
M43 is the ICD-10-CM diagnosis code for other deforming dorsopathies. It belongs to block M40-M43 (deforming dorsopathies) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 9 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: M43.0 (Spondylolysis), M43.1 (spondylolisthesis), M43.2 (spine), M43.3 (myelopathy), M43.4 (dislocation), M43.5 (dislocation), M43.6 (torticollis), M43.8 (dorsopathies) and 1 more.
Don't report M43 together with the conditions in its Excludes1 note: congenital spondylolysis and spondylolisthesis (Q76.2), hemivertebra (Q76.3-Q76.4), Klippel-Feil syndrome (Q76.1), lumbarization and sacralization (Q76.4) and 4 more.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under M43
- M43.0Spondylolysis
- M43.00Spondylolysis, site unspecifiedBillable
- M43.01Spondylolysis, occipito-atlanto-axial regionBillable
- M43.02Spondylolysis, cervical regionBillable
- M43.03Spondylolysis, cervicothoracic regionBillable
- M43.04Spondylolysis, thoracic regionBillable
- M43.05Spondylolysis, thoracolumbar regionBillable
- M43.06Spondylolysis, lumbar regionBillable
- M43.07Spondylolysis, lumbosacral regionBillable
- M43.08Spondylolysis, sacral and sacrococcygeal regionBillable
- M43.09Spondylolysis, multiple sites in spineBillable
- M43.1Spondylolisthesis
- M43.10Spondylolisthesis, site unspecifiedBillable
- M43.11Spondylolisthesis, occipito-atlanto-axial regionBillable
- M43.12Spondylolisthesis, cervical regionBillable
- M43.13Spondylolisthesis, cervicothoracic regionBillable
- M43.14Spondylolisthesis, thoracic regionBillable
- M43.15Spondylolisthesis, thoracolumbar regionBillable
- M43.16Spondylolisthesis, lumbar regionBillable
- M43.17Spondylolisthesis, lumbosacral regionBillable
- M43.18Spondylolisthesis, sacral and sacrococcygeal regionBillable
- M43.19Spondylolisthesis, multiple sites in spineBillable
- M43.2Fusion of spine
- M43.20Fusion of spine, site unspecifiedBillable
- M43.21Fusion of spine, occipito-atlanto-axial regionBillable
- M43.22Fusion of spine, cervical regionBillable
- M43.23Fusion of spine, cervicothoracic regionBillable
- M43.24Fusion of spine, thoracic regionBillable
- M43.25Fusion of spine, thoracolumbar regionBillable
- M43.26Fusion of spine, lumbar regionBillable
- M43.27Fusion of spine, lumbosacral regionBillable
- M43.28Fusion of spine, sacral and sacrococcygeal regionBillable
- M43.3Recurrent atlantoaxial dislocation with myelopathyBillable
- M43.4Other recurrent atlantoaxial dislocationBillable
- M43.5Other recurrent vertebral dislocation
- M43.5XOther recurrent vertebral dislocation
- M43.5X2Other recurrent vertebral dislocation, cervical regionBillable
- M43.5X3Other recurrent vertebral dislocation, cervicothoracic regionBillable
- M43.5X4Other recurrent vertebral dislocation, thoracic regionBillable
- M43.5X5Other recurrent vertebral dislocation, thoracolumbar regionBillable
- M43.5X6Other recurrent vertebral dislocation, lumbar regionBillable
- M43.5X7Other recurrent vertebral dislocation, lumbosacral regionBillable
- M43.5X8Other recurrent vertebral dislocation, sacral and sacrococcygeal regionBillable
- M43.5X9Other recurrent vertebral dislocation, site unspecifiedBillable
- M43.5XOther recurrent vertebral dislocation
- M43.6TorticollisBillable
- M43.8Other specified deforming dorsopathies
- M43.8XOther specified deforming dorsopathies
- M43.8X1Other specified deforming dorsopathies, occipito-atlanto-axial regionBillable
- M43.8X2Other specified deforming dorsopathies, cervical regionBillable
- M43.8X3Other specified deforming dorsopathies, cervicothoracic regionBillable
- M43.8X4Other specified deforming dorsopathies, thoracic regionBillable
- M43.8X5Other specified deforming dorsopathies, thoracolumbar regionBillable
- M43.8X6Other specified deforming dorsopathies, lumbar regionBillable
- M43.8X7Other specified deforming dorsopathies, lumbosacral regionBillable
- M43.8X8Other specified deforming dorsopathies, sacral and sacrococcygeal regionBillable
- M43.8X9Other specified deforming dorsopathies, site unspecifiedBillable
- M43.8XOther specified deforming dorsopathies
- M43.9Deforming dorsopathy, unspecifiedBillable
Coding notes
- 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.-)
Notes that apply from higher levels
Instructions written at a parent level also apply to M43.
Broader instructions also apply from Chapter 13: Diseases of the musculoskeletal system and connective tissue.
Codes whose notes reference M43
- M95Excludes2
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about M43
Is M43 billable?
- No. M43 is a header code. Report one of its more specific subcodes instead.