| M99 | Biomechanical lesions, not elsewhere classified | NON-BILLABLE CODE |
| M99.0 | Segmental and somatic dysfunction | NON-BILLABLE CODE |
| M99.00 | Segmental and somatic dysfunction of head region | BILLABLE CODE |
| M99.01 | Segmental and somatic dysfunction of cervical region | BILLABLE CODE |
| M99.02 | Segmental and somatic dysfunction of thoracic region | BILLABLE CODE |
| M99.03 | Segmental and somatic dysfunction of lumbar region | BILLABLE CODE |
| M99.04 | Segmental and somatic dysfunction of sacral region | BILLABLE CODE |
| M99.05 | Segmental and somatic dysfunction of pelvic region | BILLABLE CODE |
| M99.06 | Segmental and somatic dysfunction of lower extremity | BILLABLE CODE |
| M99.07 | Segmental and somatic dysfunction of upper extremity | BILLABLE CODE |
| M99.08 | Segmental and somatic dysfunction of rib cage | BILLABLE CODE |
| M99.09 | Segmental and somatic dysfunction of abdomen and other regions | BILLABLE CODE |
| M99.1 | Subluxation complex (vertebral) | NON-BILLABLE CODE |
| M99.10 | Subluxation complex (vertebral) of head region | BILLABLE CODE |
| M99.11 | Subluxation complex (vertebral) of cervical region | BILLABLE CODE |
| M99.12 | Subluxation complex (vertebral) of thoracic region | BILLABLE CODE |
| M99.13 | Subluxation complex (vertebral) of lumbar region | BILLABLE CODE |
| M99.14 | Subluxation complex (vertebral) of sacral region | BILLABLE CODE |
| M99.15 | Subluxation complex (vertebral) of pelvic region | BILLABLE CODE |
| M99.16 | Subluxation complex (vertebral) of lower extremity | BILLABLE CODE |
| M99.18 | Subluxation complex (vertebral) of rib cage | BILLABLE CODE |
| M99.19 | Subluxation complex (vertebral) of abdomen and other regions | BILLABLE CODE |
| M99.2 | Subluxation stenosis of neural canal | NON-BILLABLE CODE |
| M99.20 | Subluxation stenosis of neural canal of head region | BILLABLE CODE |
| M99.21 | Subluxation stenosis of neural canal of cervical region | BILLABLE CODE |
| M99.22 | Subluxation stenosis of neural canal of thoracic region | BILLABLE CODE |
| M99.23 | Subluxation stenosis of neural canal of lumbar region | BILLABLE CODE |
| M99.24 | Subluxation stenosis of neural canal of sacral region | BILLABLE CODE |
| M99.25 | Subluxation stenosis of neural canal of pelvic region | BILLABLE CODE |
| M99.26 | Subluxation stenosis of neural canal of lower extremity | BILLABLE CODE |
| M99.27 | Subluxation stenosis of neural canal of upper extremity | BILLABLE CODE |
| M99.28 | Subluxation stenosis of neural canal of rib cage | BILLABLE CODE |
| M99.29 | Subluxation stenosis of neural canal of abdomen and other regions | BILLABLE CODE |
| M99.3 | Osseous stenosis of neural canal | NON-BILLABLE CODE |
| M99.30 | Osseous stenosis of neural canal of head region | BILLABLE CODE |
| M99.31 | Osseous stenosis of neural canal of cervical region | BILLABLE CODE |
| M99.32 | Osseous stenosis of neural canal of thoracic region | BILLABLE CODE |
| M99.33 | Osseous stenosis of neural canal of lumbar region | BILLABLE CODE |
| M99.34 | Osseous stenosis of neural canal of sacral region | BILLABLE CODE |
| M99.35 | Osseous stenosis of neural canal of pelvic region | BILLABLE CODE |
| M99.36 | Osseous stenosis of neural canal of lower extremity | BILLABLE CODE |
| M99.37 | Osseous stenosis of neural canal of upper extremity | BILLABLE CODE |
| M99.38 | Osseous stenosis of neural canal of rib cage | BILLABLE CODE |
| M99.39 | Osseous stenosis of neural canal of abdomen and other regions | BILLABLE CODE |
| M99.4 | Connective tissue stenosis of neural canal | NON-BILLABLE CODE |
| M99.40 | Connective tissue stenosis of neural canal of head region | BILLABLE CODE |
| M99.41 | Connective tissue stenosis of neural canal of cervical region | BILLABLE CODE |
| M99.42 | Connective tissue stenosis of neural canal of thoracic region | BILLABLE CODE |
| M99.43 | Connective tissue stenosis of neural canal of lumbar region | BILLABLE CODE |
| M99.44 | Connective tissue stenosis of neural canal of sacral region | BILLABLE CODE |
| M99.45 | Connective tissue stenosis of neural canal of pelvic region | BILLABLE CODE |
| M99.46 | Connective tissue stenosis of neural canal of lower extremity | BILLABLE CODE |
| M99.47 | Connective tissue stenosis of neural canal of upper extremity | BILLABLE CODE |
| M99.48 | Connective tissue stenosis of neural canal of rib cage | BILLABLE CODE |
| M99.49 | Connective tissue stenosis of neural canal of abdomen and other regions | BILLABLE CODE |
| M99.5 | Intervertebral disc stenosis of neural canal | NON-BILLABLE CODE |
| M99.50 | Intervertebral disc stenosis of neural canal of head region | BILLABLE CODE |
| M99.51 | Intervertebral disc stenosis of neural canal of cervical region | BILLABLE CODE |
| M99.52 | Intervertebral disc stenosis of neural canal of thoracic region | BILLABLE CODE |
| M99.53 | Intervertebral disc stenosis of neural canal of lumbar region | BILLABLE CODE |
| M99.54 | Intervertebral disc stenosis of neural canal of sacral region | BILLABLE CODE |
| M99.55 | Intervertebral disc stenosis of neural canal of pelvic region | BILLABLE CODE |
| M99.56 | Intervertebral disc stenosis of neural canal of lower extremity | BILLABLE CODE |
| M99.57 | Intervertebral disc stenosis of neural canal of upper extremity | BILLABLE CODE |
| M99.58 | Intervertebral disc stenosis of neural canal of rib cage | BILLABLE CODE |
| M99.59 | Intervertebral disc stenosis of neural canal of abdomen and other regions | BILLABLE CODE |
| M99.6 | Osseous and subluxation stenosis of intervertebral foramina | NON-BILLABLE CODE |
| M99.60 | Osseous and subluxation stenosis of intervertebral foramina of head region | BILLABLE CODE |
| M99.61 | Osseous and subluxation stenosis of intervertebral foramina of cervical region | BILLABLE CODE |
| M99.62 | Osseous and subluxation stenosis of intervertebral foramina of thoracic region | BILLABLE CODE |
| M99.63 | Osseous and subluxation stenosis of intervertebral foramina of lumbar region | BILLABLE CODE |
| M99.64 | Osseous and subluxation stenosis of intervertebral foramina of sacral region | BILLABLE CODE |
| M99.65 | Osseous and subluxation stenosis of intervertebral foramina of pelvic region | BILLABLE CODE |
| M99.66 | Osseous and subluxation stenosis of intervertebral foramina of lower extremity | BILLABLE CODE |
| M99.67 | Osseous and subluxation stenosis of intervertebral foramina of upper extremity | BILLABLE CODE |
| M99.68 | Osseous and subluxation stenosis of intervertebral foramina of rib cage | BILLABLE CODE |
| M99.69 | Osseous and subluxation stenosis of intervertebral foramina of abdomen and other regions | BILLABLE CODE |
| M99.7 | Connective tissue and disc stenosis of intervertebral foramina | NON-BILLABLE CODE |
| M99.70 | Connective tissue and disc stenosis of intervertebral foramina of head region | BILLABLE CODE |
| M99.71 | Connective tissue and disc stenosis of intervertebral foramina of cervical region | BILLABLE CODE |
| M99.72 | Connective tissue and disc stenosis of intervertebral foramina of thoracic region | BILLABLE CODE |
| M99.73 | Connective tissue and disc stenosis of intervertebral foramina of lumbar region | BILLABLE CODE |
| M99.74 | Connective tissue and disc stenosis of intervertebral foramina of sacral region | BILLABLE CODE |
| M99.75 | Connective tissue and disc stenosis of intervertebral foramina of pelvic region | BILLABLE CODE |
| M99.76 | Connective tissue and disc stenosis of intervertebral foramina of lower extremity | BILLABLE CODE |
| M99.77 | Connective tissue and disc stenosis of intervertebral foramina of upper extremity | BILLABLE CODE |
| M99.78 | Connective tissue and disc stenosis of intervertebral foramina of rib cage | BILLABLE CODE |
| M99.79 | Connective tissue and disc stenosis of intervertebral foramina of abdomen and other regions | BILLABLE CODE |
| M99.8 | Other biomechanical lesions | NON-BILLABLE CODE |
| M99.80 | Other biomechanical lesions of head region | BILLABLE CODE |
| M99.81 | Other biomechanical lesions of cervical region | BILLABLE CODE |
| M99.82 | Other biomechanical lesions of thoracic region | BILLABLE CODE |
| M99.83 | Other biomechanical lesions of lumbar region | BILLABLE CODE |
| M99.84 | Other biomechanical lesions of sacral region | BILLABLE CODE |
| M99.85 | Other biomechanical lesions of pelvic region | BILLABLE CODE |
| M99.86 | Other biomechanical lesions of lower extremity | BILLABLE CODE |
| M99.87 | Other biomechanical lesions of upper extremity | BILLABLE CODE |
| M99.88 | Other biomechanical lesions of rib cage | BILLABLE CODE |
| M99.89 | Other biomechanical lesions of abdomen and other regions | BILLABLE CODE |
| M99.9 | Biomechanical lesion, unspecified | BILLABLE CODE |
