M46.91
ICD-10-CMUnspecified inflammatory spondylopathy, occipito-atlanto-axial region
This code signifies an inflammatory condition affecting the joints and ligaments of the upper cervical spine, specifically the occiput, atlas (C1), and axis (C2), where the precise nature of the inflammation is not specified. It indicates a general inflammatory process within this critical region responsible for head movement and stability.
This code is appropriate when documentation indicates inflammation of the occipito-atlanto-axial region, but the specific type of spondylopathy (e.g., ankylosing spondylitis, psoriatic spondylitis) is not yet diagnosed or clearly documented. It can be used for initial presentations of inflammatory neck pain localized to this area, pending further diagnostic workup. Documentation should clearly state "inflammatory spondylopathy" and specify the occipito-atlanto-axial region.
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