721 Spondylosis and allied disorders (721.0-721.91) ICD-9-CM
The 721.0-721.91 block classified 721 spondylosis and allied disorders with 12 legacy diagnosis codes. None remain valid for claim submission; each code below links to its reference page with the official ICD-10-CM replacement under the CMS General Equivalence Mappings.
Retired Code Set
ICD-9-CM stopped being valid for U.S. claims with dates of service on or after October 1, 2015, when ICD-10-CM replaced it. Use this index for historical lookups and crosswalking; for current coding, start from the ICD-10-CM codes list or the ICD-9 / ICD-10 converter.
Legacy Codes in the 721.0-721.91 Block 12 codes
None of these codes remain valid for claim submission. Each code page shows its ICD-10-CM replacement under the CMS General Equivalence Mappings.
- 721.0 Cervical spondylosis
- 721.1 Cerv spondyl w myelopath
- 721.2 Thoracic spondylosis
- 721.3 Lumbosacral spondylosis
- 721.41 Spond compr thor sp cord
- 721.42 Spond compr lumb sp cord
- 721.5 Kissing spine
- 721.6 Ankyl vert hyperostosis
- 721.7 Traumatic spondylopathy
- 721.8 Spinal disorders NEC
- 721.90 Spondylos NOS w/o myelop
- 721.91 Spondylosis NOS w myelop
Questions About This Page
Are the 721.0-721.91 codes still billable?
No. Every code in this block became invalid for U.S. claims after September 30, 2015. Each code page linked above shows the ICD-10-CM replacement CMS assigned in the General Equivalence Mappings, and the ICD-9 / ICD-10 converter translates any of them directly.
What did the 721.0-721.91 block classify?
The block classified 721 spondylosis and allied disorders with 12 codes in the final ICD-9-CM release. It sat under Diseases of the musculoskeletal system and connective tissue (710–739) in the legacy hierarchy.
Related References
Source: final CMS ICD-9-CM release (version date October 1, 2014). Retired from U.S. claims after September 30, 2015.
