2026 ICD-10-CM Diagnosis Code M43Other deforming dorsopathies

ICD-10-CM Codes›M00–M99›M40-M43›M43

ICD-10-CM M43
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M43 is a non-billable ICD-10-CM category code for other deforming dorsopathies, so it cannot be submitted on claims. Use a more specific code from this category instead, such as M43.00, M43.01, M43.02, and M43.03.

Code Identity

ICD-10-CM Code
M43
Billable Status
No — Non-Billable Category
Code Describes
Other deforming dorsopathies
Short Description
Other deforming dorsopathies
Same as the full description in the CMS dataset.
Chapter
M40-M43
Deforming dorsopathies

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM40-M43Deforming dorsopathies
CategoryM43Other deforming dorsopathies
This CodeM43Other deforming dorsopathies

Specific Coding for Other deforming dorsopathiesOverview

Non-specific codes like M43 require more characters. Use one of these billable codes instead:

  • M43.0 for Spondylolysis

  • Use M43.00 for Spondylolysis, site unspecified

  • Use M43.01 for Spondylolysis, occipito-atlanto-axial region

  • Use M43.02 for Spondylolysis, cervical region

  • Use M43.03 for Spondylolysis, cervicothoracic region

  • Use M43.04 for Spondylolysis, thoracic region

  • Use M43.05 for Spondylolysis, thoracolumbar region

  • Use M43.06 for Spondylolysis, lumbar region

  • Use M43.07 for Spondylolysis, lumbosacral region

  • Use M43.08 for Spondylolysis, sacral and sacrococcygeal region

  • Use M43.09 for Spondylolysis, multiple sites in spine

  • M43.1 for Spondylolisthesis

  • Use M43.10 for Spondylolisthesis, site unspecified

  • Use M43.11 for Spondylolisthesis, occipito-atlanto-axial region

  • Use M43.12 for Spondylolisthesis, cervical region

  • Use M43.13 for Spondylolisthesis, cervicothoracic region

  • Use M43.14 for Spondylolisthesis, thoracic region

  • Use M43.15 for Spondylolisthesis, thoracolumbar region

  • Use M43.16 for Spondylolisthesis, lumbar region

  • Use M43.17 for Spondylolisthesis, lumbosacral region

  • Use M43.18 for Spondylolisthesis, sacral and sacrococcygeal region

  • Use M43.19 for Spondylolisthesis, multiple sites in spine

  • M43.2 for Fusion of spine

  • Use M43.20 for Fusion of spine, site unspecified

  • Use M43.21 for Fusion of spine, occipito-atlanto-axial region

  • Use M43.22 for Fusion of spine, cervical region

  • Use M43.23 for Fusion of spine, cervicothoracic region

  • Use M43.24 for Fusion of spine, thoracic region

  • Use M43.25 for Fusion of spine, thoracolumbar region

  • Use M43.26 for Fusion of spine, lumbar region

  • Use M43.27 for Fusion of spine, lumbosacral region

  • Use M43.28 for Fusion of spine, sacral and sacrococcygeal region

  • Use M43.3 for Recurrent atlantoaxial dislocation with myelopathy

  • Use M43.4 for Other recurrent atlantoaxial dislocation

  • M43.5 for Other recurrent vertebral dislocation

  • M43.5X for Other recurrent vertebral dislocation

  • Use M43.6 for Torticollis

  • M43.8 for Other specified deforming dorsopathies

  • M43.8X for Other specified deforming dorsopathies

  • Use M43.9 for Deforming dorsopathy, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • 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

Patient EducationClinical

Spine Injuries and Disorders

Your backbone, or spine, is made up of 26 bone discs called vertebrae. The vertebrae protect your spinal cord and allow you to stand and bend. A number of problems can change the structure of the spine or damage the vertebrae and surrounding tissue. They include:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About M43Overview

Is M43 (Other deforming dorsopathies) a billable code?

No. This is a category header that groups the codes for other deforming dorsopathies, and headers cannot be submitted on claims. Claims for other deforming dorsopathies need a more specific code from this category, such as M43.00, M43.01, and M43.02.