M43.1Spondylolisthesis

M43.1 is the ICD-10-CM diagnosis code for spondylolisthesis. It belongs to category M43 (other deforming dorsopathies), 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 10 subcodes must be used instead.

Within M43 (other deforming dorsopathies), M43.1 is specifically for spondylolisthesis. Related codes cover Spondylolysis (M43.0), fusion of spine (M43.2), recurrent atlantoaxial dislocation with myelopathy (M43.3), other recurrent atlantoaxial dislocation (M43.4), other recurrent vertebral dislocation (M43.5), torticollis (M43.6), other specified deforming dorsopathies (M43.8) and deforming dorsopathy, unspecified (M43.9).

To report this condition, pick the subcode that matches the documentation: M43.10 (site unspecified), M43.11 (occipito-atlanto-axial region), M43.12 (cervical region), M43.13 (cervicothoracic region), M43.14 (thoracic region), M43.15 (thoracolumbar region), M43.16 (lumbar region), M43.17 (lumbosacral region) and 2 more.

Don't report M43.1 together with the conditions in its Excludes1 note: acute traumatic of lumbosacral region (S33.1), acute traumatic of sites other than lumbosacral- code to Fracture, vertebra, by region and congenital spondylolisthesis (Q76.2).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.