2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Musculoskeletal System And Connective Tissue 710-739 > Dorsopathies 720-724 > Spondylosis And Allied Disorders 721.* > 2006 ICD-9-CM Diagnosis 721.9 Spondylosis of unspecified site View the most recent version of ICD-9-CM 721.9 721.9 is a non-specific code that cannot be used to specify a diagnosis View the ICD-9-CM Volume 1 721.* hierarchy