ICD-10-CM Section · M99-M99
Biomechanical lesions, not elsewhere classified
101 codes in this section
101
Total Codes
91
Billable
10
Header (Non-Billable)
1
Top-Level Codes
About Section M99
Section M99 (M99-M99) covers biomechanical lesions, not elsewhere classified. It sits within the Diseases of the musculoskeletal system and connective tissue chapter (M00-M99). This section contains 101 ICD-10-CM codes, 91 billable diagnoses you can submit on a claim, and 10 non-billable header codes used to organize the hierarchy.
Codes are organized below by 3-character root. Click the root to see all subcodes underneath it, or click any individual code for full coverage data, payer policies, and linked CPT procedures.
Codes in M99
Grouped by 3-character root code. Click any code for full detail.
M99
Biomechanical lesions, not elsewhere classified
100 subcodes
| M99.0 | Segmental and somatic dysfunction | Header |
| M99.00 | Segmental and somatic dysfunction of head region | Billable |
| M99.01 | Segmental and somatic dysfunction of cervical region | Billable |
| M99.02 | Segmental and somatic dysfunction of thoracic region | Billable |
| M99.03 | Segmental and somatic dysfunction of lumbar region | Billable |
| M99.04 | Segmental and somatic dysfunction of sacral region | Billable |
| M99.05 | Segmental and somatic dysfunction of pelvic region | Billable |
| M99.06 | Segmental and somatic dysfunction of lower extremity | Billable |
| M99.07 | Segmental and somatic dysfunction of upper extremity | Billable |
| M99.08 | Segmental and somatic dysfunction of rib cage | Billable |
| M99.09 | Segmental and somatic dysfunction of abdomen and other regions | Billable |
| M99.1 | Subluxation complex (vertebral) | Header |
| M99.10 | Subluxation complex (vertebral) of head region | Billable |
| M99.11 | Subluxation complex (vertebral) of cervical region | Billable |
| M99.12 | Subluxation complex (vertebral) of thoracic region | Billable |
| M99.13 | Subluxation complex (vertebral) of lumbar region | Billable |
| M99.14 | Subluxation complex (vertebral) of sacral region | Billable |
| M99.15 | Subluxation complex (vertebral) of pelvic region | Billable |
| M99.16 | Subluxation complex (vertebral) of lower extremity | Billable |
| M99.17 | Subluxation complex (vertebral) of upper extremity | Billable |
| M99.18 | Subluxation complex (vertebral) of rib cage | Billable |
| M99.19 | Subluxation complex (vertebral) of abdomen and other regions | Billable |
| M99.2 | Subluxation stenosis of neural canal | Header |
| M99.20 | Subluxation stenosis of neural canal of head region | Billable |
| M99.21 | Subluxation stenosis of neural canal of cervical region | Billable |
| M99.22 | Subluxation stenosis of neural canal of thoracic region | Billable |
| M99.23 | Subluxation stenosis of neural canal of lumbar region | Billable |
| M99.24 | Subluxation stenosis of neural canal of sacral region | Billable |
| M99.25 | Subluxation stenosis of neural canal of pelvic region | Billable |
| M99.26 | Subluxation stenosis of neural canal of lower extremity | Billable |
| M99.27 | Subluxation stenosis of neural canal of upper extremity | Billable |
| M99.28 | Subluxation stenosis of neural canal of rib cage | Billable |
| M99.29 | Subluxation stenosis of neural canal of abdomen and other regions | Billable |
| M99.3 | Osseous stenosis of neural canal | Header |
| M99.30 | Osseous stenosis of neural canal of head region | Billable |
| M99.31 | Osseous stenosis of neural canal of cervical region | Billable |
| M99.32 | Osseous stenosis of neural canal of thoracic region | Billable |
| M99.33 | Osseous stenosis of neural canal of lumbar region | Billable |
| M99.34 | Osseous stenosis of neural canal of sacral region | Billable |
| M99.35 | Osseous stenosis of neural canal of pelvic region | Billable |
| M99.36 | Osseous stenosis of neural canal of lower extremity | Billable |
| M99.37 | Osseous stenosis of neural canal of upper extremity | Billable |
| M99.38 | Osseous stenosis of neural canal of rib cage | Billable |
| M99.39 | Osseous stenosis of neural canal of abdomen and other regions | Billable |
| M99.4 | Connective tissue stenosis of neural canal | Header |
| M99.40 | Connective tissue stenosis of neural canal of head region | Billable |
| M99.41 | Connective tissue stenosis of neural canal of cervical region | Billable |
| M99.42 | Connective tissue stenosis of neural canal of thoracic region | Billable |
| M99.43 | Connective tissue stenosis of neural canal of lumbar region | Billable |
| M99.44 | Connective tissue stenosis of neural canal of sacral region | Billable |
| M99.45 | Connective tissue stenosis of neural canal of pelvic region | Billable |
| M99.46 | Connective tissue stenosis of neural canal of lower extremity | Billable |
| M99.47 | Connective tissue stenosis of neural canal of upper extremity | Billable |
| M99.48 | Connective tissue stenosis of neural canal of rib cage | Billable |
| M99.49 | Connective tissue stenosis of neural canal of abdomen and other regions | Billable |
| M99.5 | Intervertebral disc stenosis of neural canal | Header |
| M99.50 | Intervertebral disc stenosis of neural canal of head region | Billable |
| M99.51 | Intervertebral disc stenosis of neural canal of cervical region | Billable |
| M99.52 | Intervertebral disc stenosis of neural canal of thoracic region | Billable |
| M99.53 | Intervertebral disc stenosis of neural canal of lumbar region | Billable |
| M99.54 | Intervertebral disc stenosis of neural canal of sacral region | Billable |
| M99.55 | Intervertebral disc stenosis of neural canal of pelvic region | Billable |
| M99.56 | Intervertebral disc stenosis of neural canal of lower extremity | Billable |
| M99.57 | Intervertebral disc stenosis of neural canal of upper extremity | Billable |
| M99.58 | Intervertebral disc stenosis of neural canal of rib cage | Billable |
| M99.59 | Intervertebral disc stenosis of neural canal of abdomen and other regions | Billable |
| M99.6 | Osseous and subluxation stenosis of intervertebral foramina | Header |
| M99.60 | Osseous and subluxation stenosis of intervertebral foramina of head region | Billable |
| M99.61 | Osseous and subluxation stenosis of intervertebral foramina of cervical region | Billable |
| M99.62 | Osseous and subluxation stenosis of intervertebral foramina of thoracic region | Billable |
| M99.63 | Osseous and subluxation stenosis of intervertebral foramina of lumbar region | Billable |
| M99.64 | Osseous and subluxation stenosis of intervertebral foramina of sacral region | Billable |
| M99.65 | Osseous and subluxation stenosis of intervertebral foramina of pelvic region | Billable |
| M99.66 | Osseous and subluxation stenosis of intervertebral foramina of lower extremity | Billable |
| M99.67 | Osseous and subluxation stenosis of intervertebral foramina of upper extremity | Billable |
| M99.68 | Osseous and subluxation stenosis of intervertebral foramina of rib cage | Billable |
| M99.69 | Osseous and subluxation stenosis of intervertebral foramina of abdomen and other regions | Billable |
| M99.7 | Connective tissue and disc stenosis of intervertebral foramina | Header |
| M99.70 | Connective tissue and disc stenosis of intervertebral foramina of head region | Billable |
| M99.71 | Connective tissue and disc stenosis of intervertebral foramina of cervical region | Billable |
| M99.72 | Connective tissue and disc stenosis of intervertebral foramina of thoracic region | Billable |
| M99.73 | Connective tissue and disc stenosis of intervertebral foramina of lumbar region | Billable |
| M99.74 | Connective tissue and disc stenosis of intervertebral foramina of sacral region | Billable |
| M99.75 | Connective tissue and disc stenosis of intervertebral foramina of pelvic region | Billable |
| M99.76 | Connective tissue and disc stenosis of intervertebral foramina of lower extremity | Billable |
| M99.77 | Connective tissue and disc stenosis of intervertebral foramina of upper extremity | Billable |
| M99.78 | Connective tissue and disc stenosis of intervertebral foramina of rib cage | Billable |
| M99.79 | Connective tissue and disc stenosis of intervertebral foramina of abdomen and other regions | Billable |
| M99.8 | Other biomechanical lesions | Header |
| M99.80 | Other biomechanical lesions of head region | Billable |
| M99.81 | Other biomechanical lesions of cervical region | Billable |
| M99.82 | Other biomechanical lesions of thoracic region | Billable |
| M99.83 | Other biomechanical lesions of lumbar region | Billable |
| M99.84 | Other biomechanical lesions of sacral region | Billable |
| M99.85 | Other biomechanical lesions of pelvic region | Billable |
| M99.86 | Other biomechanical lesions of lower extremity | Billable |
| M99.87 | Other biomechanical lesions of upper extremity | Billable |
| M99.88 | Other biomechanical lesions of rib cage | Billable |
| M99.89 | Other biomechanical lesions of abdomen and other regions | Billable |
| M99.9 | Biomechanical lesion, unspecified | Billable |
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Verified against the CMS 2026 code set on May 31, 2026.
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