M46.81

Billable

Other specified inflammatory spondylopathies, occipito-atlanto-axial region

HCC Category Mapping

V24HCC 40 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease

0.307

ESRDHCC 40 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease

0.000

What This Code Means

A non-infectious inflammatory condition affecting the uppermost part of the spine where the skull connects to the neck (occipito-atlanto-axial region).

Coding Tips

•This rare location may be associated with systemic inflammatory conditions; document any associated diagnoses
•Ensure distinction from infectious causes and document imaging findings

Clinical Significance

Non-infectious inflammatory conditions of the occipito-atlanto-axial region are rare but potentially serious due to proximity to vital neurological structures. These conditions require careful monitoring for neurological complications and specialized anti-inflammatory management approaches.

Documentation Requirements

✓Occipito-atlanto-axial region involvement
✓Non-infectious inflammatory etiology
✓Advanced cervical spine imaging
✓Neurological examination findings
✓Inflammatory markers and trends
✓Response to anti-inflammatory therapy
✓Assessment of cervical stability
✓Functional neurological outcomes

Commonly Confused Codes

M46.51 — Infective spondylopathy same region when infectious M46.80 — Site unspecified when location documented M48.02 — Spinal stenosis when structural rather than inflammatory G93.1 — Brain damage when neurological complications occur

Code Hierarchy

└M46Other inflammatory spondylopathies └M46.8Other specified inflammatory spondylopathies └M46.81Other specified inflammatory spondylopathies, occipito-atlanto-axial region

└M46.81Other specified inflammatory spondylopathies, occipito-atlanto-axial region