M99 is a non-billable/non-specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Biomechanical lesions, not elsewhere classified.
This category should not be used if the condition can be classified elsewhere.
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Segmental and somatic dysfunction
Subluxation complex (vertebral)
Subluxation stenosis of neural canal
Osseous stenosis of neural canal
Connective tissue stenosis of neural canal
Intervertebral disc stenosis of neural canal
Osseous and subluxation stenosis of intervertebral foramina
Connective tissue and disc stenosis of intervertebral foramina
Other biomechanical lesions
Biomechanical lesion, unspecified
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