721 Spondylosis and allied disorders 
721.0 Cervical spondylosis without myelopathy convert 721.0 to ICD-10-CM 721.1 Cervical spondylosis with myelopathy convert 721.1 to ICD-10-CM 721.2 Thoracic spondylosis without myelopathy convert 721.2 to ICD-10-CM 721.3 Lumbosacral spondylosis without myelopathy convert 721.3 to ICD-10-CM 721.4 Thoracic or lumbar spondylosis with myelopathy 
721.41 Spondylosis with myelopathy thoracic region convert 721.41 to ICD-10-CM
721.42 Spondylosis with myelopathy lumbar region convert 721.42 to ICD-10-CM 721.5 Kissing spine convert 721.5 to ICD-10-CM 721.6 Ankylosing vertebral hyperostosis convert 721.6 to ICD-10-CM 721.7 Traumatic spondylopathy convert 721.7 to ICD-10-CM 721.8 Other allied disorders of spine convert 721.8 to ICD-10-CM 721.9 Spondylosis of unspecified site 
721.90 Spondylosis of unspecified site without myelopathy convert 721.90 to ICD-10-CM 721.91 Spondylosis of unspecified site with myelopathy convert 721.91 to ICD-10-CM