1. M99 Biomechanical lesions, not elsewhere classified

    Note: This category should not be used if the condition can be classified elsewhere.

    1. M99.0 Segmental and somatic dysfunction

      1. M99.00 Segmental and somatic dysfunction of head region

      2. M99.01 Segmental and somatic dysfunction of cervical region

      3. M99.02 Segmental and somatic dysfunction of thoracic region

      4. M99.03 Segmental and somatic dysfunction of lumbar region

      5. M99.04 Segmental and somatic dysfunction of sacral region

      6. M99.05 Segmental and somatic dysfunction of pelvic region

      7. M99.06 Segmental and somatic dysfunction of lower extremity

      8. M99.07 Segmental and somatic dysfunction of upper extremity

      9. M99.08 Segmental and somatic dysfunction of rib cage

      10. M99.09 Segmental and somatic dysfunction of abdomen and other regions

    2. M99.1 Subluxation complex (vertebral)

      1. M99.10 Subluxation complex (vertebral) of head region

      2. M99.11 Subluxation complex (vertebral) of cervical region

      3. M99.12 Subluxation complex (vertebral) of thoracic region

      4. M99.13 Subluxation complex (vertebral) of lumbar region

      5. M99.14 Subluxation complex (vertebral) of sacral region

      6. M99.15 Subluxation complex (vertebral) of pelvic region

      7. M99.16 Subluxation complex (vertebral) of lower extremity

      8. M99.17 Subluxation complex (vertebral) of upper extremity

      9. M99.18 Subluxation complex (vertebral) of rib cage

      10. M99.19 Subluxation complex (vertebral) of abdomen and other regions

    3. M99.2 Subluxation stenosis of neural canal

      1. M99.20 Subluxation stenosis of neural canal of head region

      2. M99.21 Subluxation stenosis of neural canal of cervical region

      3. M99.22 Subluxation stenosis of neural canal of thoracic region

      4. M99.23 Subluxation stenosis of neural canal of lumbar region

      5. M99.24 Subluxation stenosis of neural canal of sacral region

      6. M99.25 Subluxation stenosis of neural canal of pelvic region

      7. M99.26 Subluxation stenosis of neural canal of lower extremity

      8. M99.27 Subluxation stenosis of neural canal of upper extremity

      9. M99.28 Subluxation stenosis of neural canal of rib cage

      10. M99.29 Subluxation stenosis of neural canal of abdomen and other regions

    4. M99.3 Osseous stenosis of neural canal

      1. M99.30 Osseous stenosis of neural canal of head region

      2. M99.31 Osseous stenosis of neural canal of cervical region

      3. M99.32 Osseous stenosis of neural canal of thoracic region

      4. M99.33 Osseous stenosis of neural canal of lumbar region

      5. M99.34 Osseous stenosis of neural canal of sacral region

      6. M99.35 Osseous stenosis of neural canal of pelvic region

      7. M99.36 Osseous stenosis of neural canal of lower extremity

      8. M99.37 Osseous stenosis of neural canal of upper extremity

      9. M99.38 Osseous stenosis of neural canal of rib cage

      10. M99.39 Osseous stenosis of neural canal of abdomen and other regions

    5. M99.4 Connective tissue stenosis of neural canal

      1. M99.40 Connective tissue stenosis of neural canal of head region

      2. M99.41 Connective tissue stenosis of neural canal of cervical region

      3. M99.42 Connective tissue stenosis of neural canal of thoracic region

      4. M99.43 Connective tissue stenosis of neural canal of lumbar region

      5. M99.44 Connective tissue stenosis of neural canal of sacral region

      6. M99.45 Connective tissue stenosis of neural canal of pelvic region

      7. M99.46 Connective tissue stenosis of neural canal of lower extremity

      8. M99.47 Connective tissue stenosis of neural canal of upper extremity

      9. M99.48 Connective tissue stenosis of neural canal of rib cage

      10. M99.49 Connective tissue stenosis of neural canal of abdomen and other regions

    6. M99.5 Intervertebral disc stenosis of neural canal

      1. M99.50 Intervertebral disc stenosis of neural canal of head region

      2. M99.51 Intervertebral disc stenosis of neural canal of cervical region

      3. M99.52 Intervertebral disc stenosis of neural canal of thoracic region

      4. M99.53 Intervertebral disc stenosis of neural canal of lumbar region

      5. M99.54 Intervertebral disc stenosis of neural canal of sacral region

      6. M99.55 Intervertebral disc stenosis of neural canal of pelvic region

      7. M99.56 Intervertebral disc stenosis of neural canal of lower extremity

      8. M99.57 Intervertebral disc stenosis of neural canal of upper extremity

      9. M99.58 Intervertebral disc stenosis of neural canal of rib cage

      10. M99.59 Intervertebral disc stenosis of neural canal of abdomen and other regions

    7. M99.6 Osseous and subluxation stenosis of intervertebral foramina

      1. M99.60 Osseous and subluxation stenosis of intervertebral foramina of head region

      2. M99.61 Osseous and subluxation stenosis of intervertebral foramina of cervical region

      3. M99.62 Osseous and subluxation stenosis of intervertebral foramina of thoracic region

      4. M99.63 Osseous and subluxation stenosis of intervertebral foramina of lumbar region

      5. M99.64 Osseous and subluxation stenosis of intervertebral foramina of sacral region

      6. M99.65 Osseous and subluxation stenosis of intervertebral foramina of pelvic region

      7. M99.66 Osseous and subluxation stenosis of intervertebral foramina of lower extremity

      8. M99.67 Osseous and subluxation stenosis of intervertebral foramina of upper extremity

      9. M99.68 Osseous and subluxation stenosis of intervertebral foramina of rib cage

      10. M99.69 Osseous and subluxation stenosis of intervertebral foramina of abdomen and other regions

    8. M99.7 Connective tissue and disc stenosis of intervertebral foramina

      1. M99.70 Connective tissue and disc stenosis of intervertebral foramina of head region

      2. M99.71 Connective tissue and disc stenosis of intervertebral foramina of cervical region

      3. M99.72 Connective tissue and disc stenosis of intervertebral foramina of thoracic region

      4. M99.73 Connective tissue and disc stenosis of intervertebral foramina of lumbar region

      5. M99.74 Connective tissue and disc stenosis of intervertebral foramina of sacral region

      6. M99.75 Connective tissue and disc stenosis of intervertebral foramina of pelvic region

      7. M99.76 Connective tissue and disc stenosis of intervertebral foramina of lower extremity

      8. M99.77 Connective tissue and disc stenosis of intervertebral foramina of upper extremity

      9. M99.78 Connective tissue and disc stenosis of intervertebral foramina of rib cage

      10. M99.79 Connective tissue and disc stenosis of intervertebral foramina of abdomen and other regions

    9. M99.8 Other biomechanical lesions

      1. M99.80 Other biomechanical lesions of head region

      2. M99.81 Other biomechanical lesions of cervical region

      3. M99.82 Other biomechanical lesions of thoracic region

      4. M99.83 Other biomechanical lesions of lumbar region

      5. M99.84 Other biomechanical lesions of sacral region

      6. M99.85 Other biomechanical lesions of pelvic region

      7. M99.86 Other biomechanical lesions of lower extremity

      8. M99.87 Other biomechanical lesions of upper extremity

      9. M99.88 Other biomechanical lesions of rib cage

      10. M99.89 Other biomechanical lesions of abdomen and other regions

    10. M99.9 Biomechanical lesion, unspecified

Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.