Spondylopathies (M45-M49) ICD-10-CM
The M45–M49 section covers spondylopathies with 313 ICD-10-CM diagnosis codes, of which 264 are billable in fiscal year 2026. The section is organized into the 5 code ranges listed below.
Code Ranges in This Section 5 ranges · 313 codes
| Code Range | Title | Codes | Billable |
|---|---|---|---|
| M45 | Ankylosing spondylitis (M45) | 22 | 20 |
| M46 | Other inflammatory spondylopathies (M46) | 78 | 70 |
| M47 | Spondylosis (M47) | 54 | 45 |
| M48 | Other spondylopathies (M48) | 147 | 119 |
| M49 | Spondylopathies in diseases classified elsewhere (M49) | 12 | 10 |
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the M45–M49 Code Range
ICD-10 codes M45-M49 cover a group of conditions called spondylopathies, which are disorders affecting the spine. These codes capture detailed variations of spinal inflammations, degenerative diseases, infections, fractures, and anatomical changes across different spine regions.
This range includes ankylosing spondylitis (M45), also known as rheumatoid arthritis of the spine, with subcodes specifying locations like cervical or thoracic regions. The codes for non-radiographic axial spondyloarthritis (M45.A) represent inflammation without visible X-ray changes. The M46 series identifies various inflammatory spondylopathies, such as sacroiliitis and vertebral osteomyelitis, including infections of intervertebral discs and paraspinal tissue. The M47 codes specify spondylosis—a degenerative arthritis of spinal joints—with subsets distinguishing myelopathy or radiculopathy (nerve-related symptoms). Spinal stenosis (M48.0), ankylosing hyperostosis or Forestier’s disease (M48.1), traumatic spondylopathy (M48.3), and fatigue fractures of vertebra (M48.4) also appear here, allowing precise coding of mechanical and degenerative spinal problems. Lastly, M49 addresses spondylopathies arising as part of other diseases, such as infectious etiologies including Brucella-related spine infections. These codes support accurate documentation of complex spinal disorders by specifying the affected regions and pathologies.
Questions About This Page
How many codes are in the M45-M49 range?
The M45-M49 range contains 313 ICD-10-CM diagnosis codes in FY 2026. 264 of them are billable, and the rest are category headers that organize the section.
What conditions does M45-M49 cover?
The range covers spondylopathies. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
