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M99.21

Billable

Subluxation stenosis of neural canal of cervical region

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

A partial dislocation of neck vertebrae that narrows the nerve canal, potentially causing neck pain, numbness, or weakness in the arms and hands.

Coding Tips

  • •This is one of the most commonly coded subluxation stenosis codes; ensure cervical region is clearly documented
  • •Document associated symptoms like radiculopathy or myelopathy for complete clinical documentation

Code Hierarchy

└M99Biomechanical lesions, not elsewhere classified└M99.2Subluxation stenosis of neural canal└M99.21Subluxation stenosis of neural canal of cervical region
└M99.21Subluxation stenosis of neural canal of cervical region

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