Spinal enthesopathy

M46.00 classifies spinal enthesopathy — pathological changes at ligamentous or muscular attachment points along the spine — when the specific spinal region is not documented or cannot be determined.

Pathological disorder of ligamentous or muscular attachment sites at the occipito-atlanto-axial region of the spine — the junction of the skull base (occiput), atlas (C1), and axis (C2).

Disorder of ligamentous or muscular attachments (entheses) at the cervical spine, classified under other inflammatory spondylopathies.

Pathological changes affecting the ligamentous or muscular attachment sites along the cervicothoracic junction of the spine, spanning the transitional zone where the cervical spine meets the thoracic spine.

M46.04 identifies pathological changes at the tendon and ligament insertion sites along the thoracic spine (T1–T12), classified under other inflammatory spondylopathies.

Pathological changes at the tendon and ligament insertion points along the thoracolumbar junction (approximately T12–L1), classified under inflammatory spondylopathies.

M46.06 identifies a disorder of the ligamentous or muscular attachments along the lumbar spine (L1–L5), classifying it as a spinal enthesopathy with inflammatory spondylopathy characteristics.

M46.07 identifies pathological changes at the ligamentous or muscular attachment points along the lumbosacral spine — the transitional zone where the lumbar vertebrae meet the sacrum.

Pathological changes at the ligamentous and muscular attachment sites of the spine within the sacral and sacrococcygeal region, including inflammatory or degenerative disruption at the sacrum or coccyx insertions.

Pathological changes at the ligamentous and muscular attachment points along the spine, affecting two or more distinct spinal regions simultaneously.