Skip to main content
ICD-10/M99

M99 ICD-10-CM Code: Biomechanical lesions, not elsewhere classified

Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.

Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.

Official Registry Overview & Definition

Biomechanical lesions, not elsewhere classified is a non-billable ICD-10-CM category code (M99). A more specific billable subcode must be selected for claims submission.

Frequently Asked Questions (FAQ) & Clinical Guidance

Can M99 be billed directly?

No. M99 (Biomechanical lesions, not elsewhere classified) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to M99 in its code family, with their registry titles.

  • M99.0 — Segmental and somatic dysfunction
  • M99.00 — Segmental and somatic dysfunction of head region
  • M99.01 — Segmental and somatic dysfunction of cervical region
  • M99.02 — Segmental and somatic dysfunction of thoracic region
  • M99.03 — Segmental and somatic dysfunction of lumbar region
  • M99.04 — Segmental and somatic dysfunction of sacral region
  • M99.05 — Segmental and somatic dysfunction of pelvic region
  • M99.06 — Segmental and somatic dysfunction of lower extremity
  • M99.07 — Segmental and somatic dysfunction of upper extremity
  • M99.08 — Segmental and somatic dysfunction of rib cage
  • M99.09 — Segmental and somatic dysfunction of abdomen and other regions
  • M99.1 — Subluxation complex (vertebral)
  • M99.10 — Subluxation complex (vertebral) of head region
  • M99.11 — Subluxation complex (vertebral) of cervical region
  • M99.12 — Subluxation complex (vertebral) of thoracic region
  • M99.13 — Subluxation complex (vertebral) of lumbar region
  • M99.14 — Subluxation complex (vertebral) of sacral region
  • M99.15 — Subluxation complex (vertebral) of pelvic region
  • M99.16 — Subluxation complex (vertebral) of lower extremity
  • M99.17 — Subluxation complex (vertebral) of upper extremity
  • M99.18 — Subluxation complex (vertebral) of rib cage
  • M99.19 — Subluxation complex (vertebral) of abdomen and other regions
  • M99.2 — Subluxation stenosis of neural canal
  • M99.20 — Subluxation stenosis of neural canal of head region
  • M99.21 — Subluxation stenosis of neural canal of cervical region
  • M99.22 — Subluxation stenosis of neural canal of thoracic region
  • M99.23 — Subluxation stenosis of neural canal of lumbar region
  • M99.24 — Subluxation stenosis of neural canal of sacral region
  • M99.25 — Subluxation stenosis of neural canal of pelvic region
  • M99.26 — Subluxation stenosis of neural canal of lower extremity
  • M99.27 — Subluxation stenosis of neural canal of upper extremity
  • M99.28 — Subluxation stenosis of neural canal of rib cage
  • M99.29 — Subluxation stenosis of neural canal of abdomen and other regions
  • M99.3 — Osseous stenosis of neural canal
  • M99.30 — Osseous stenosis of neural canal of head region
  • M99.31 — Osseous stenosis of neural canal of cervical region
  • M99.32 — Osseous stenosis of neural canal of thoracic region
  • M99.33 — Osseous stenosis of neural canal of lumbar region
  • M99.34 — Osseous stenosis of neural canal of sacral region
  • M99.35 — Osseous stenosis of neural canal of pelvic region
  • M99.36 — Osseous stenosis of neural canal of lower extremity
  • M99.37 — Osseous stenosis of neural canal of upper extremity
  • M99.38 — Osseous stenosis of neural canal of rib cage
  • M99.39 — Osseous stenosis of neural canal of abdomen and other regions
  • M99.4 — Connective tissue stenosis of neural canal
  • M99.40 — Connective tissue stenosis of neural canal of head region
  • M99.41 — Connective tissue stenosis of neural canal of cervical region
  • M99.42 — Connective tissue stenosis of neural canal of thoracic region
  • M99.43 — Connective tissue stenosis of neural canal of lumbar region
  • M99.44 — Connective tissue stenosis of neural canal of sacral region
  • M99.45 — Connective tissue stenosis of neural canal of pelvic region
  • M99.46 — Connective tissue stenosis of neural canal of lower extremity
  • M99.47 — Connective tissue stenosis of neural canal of upper extremity
  • M99.48 — Connective tissue stenosis of neural canal of rib cage
  • M99.49 — Connective tissue stenosis of neural canal of abdomen and other regions
  • M99.5 — Intervertebral disc stenosis of neural canal
  • M99.50 — Intervertebral disc stenosis of neural canal of head region
  • M99.51 — Intervertebral disc stenosis of neural canal of cervical region
  • M99.52 — Intervertebral disc stenosis of neural canal of thoracic region
  • M99.53 — Intervertebral disc stenosis of neural canal of lumbar region
  • M99.54 — Intervertebral disc stenosis of neural canal of sacral region
  • M99.55 — Intervertebral disc stenosis of neural canal of pelvic region
  • M99.56 — Intervertebral disc stenosis of neural canal of lower extremity
  • M99.57 — Intervertebral disc stenosis of neural canal of upper extremity
  • M99.58 — Intervertebral disc stenosis of neural canal of rib cage
  • M99.59 — Intervertebral disc stenosis of neural canal of abdomen and other regions
  • M99.6 — Osseous and subluxation stenosis of intervertebral foramina
  • M99.60 — Osseous and subluxation stenosis of intervertebral foramina of head region
  • M99.61 — Osseous and subluxation stenosis of intervertebral foramina of cervical region
  • M99.62 — Osseous and subluxation stenosis of intervertebral foramina of thoracic region
  • M99.63 — Osseous and subluxation stenosis of intervertebral foramina of lumbar region
  • M99.64 — Osseous and subluxation stenosis of intervertebral foramina of sacral region
  • M99.65 — Osseous and subluxation stenosis of intervertebral foramina of pelvic region
  • M99.66 — Osseous and subluxation stenosis of intervertebral foramina of lower extremity
  • M99.67 — Osseous and subluxation stenosis of intervertebral foramina of upper extremity
  • M99.68 — Osseous and subluxation stenosis of intervertebral foramina of rib cage
  • M99.69 — Osseous and subluxation stenosis of intervertebral foramina of abdomen and other regions
  • M99.7 — Connective tissue and disc stenosis of intervertebral foramina
  • M99.70 — Connective tissue and disc stenosis of intervertebral foramina of head region
  • M99.71 — Connective tissue and disc stenosis of intervertebral foramina of cervical region
  • M99.72 — Connective tissue and disc stenosis of intervertebral foramina of thoracic region
  • M99.73 — Connective tissue and disc stenosis of intervertebral foramina of lumbar region
  • M99.74 — Connective tissue and disc stenosis of intervertebral foramina of sacral region
  • M99.75 — Connective tissue and disc stenosis of intervertebral foramina of pelvic region
  • M99.76 — Connective tissue and disc stenosis of intervertebral foramina of lower extremity
  • M99.77 — Connective tissue and disc stenosis of intervertebral foramina of upper extremity
  • M99.78 — Connective tissue and disc stenosis of intervertebral foramina of rib cage
  • M99.79 — Connective tissue and disc stenosis of intervertebral foramina of abdomen and other regions
  • M99.8 — Other biomechanical lesions
  • M99.80 — Other biomechanical lesions of head region
  • M99.81 — Other biomechanical lesions of cervical region
  • M99.82 — Other biomechanical lesions of thoracic region
  • M99.83 — Other biomechanical lesions of lumbar region
  • M99.84 — Other biomechanical lesions of sacral region
  • M99.85 — Other biomechanical lesions of pelvic region
  • M99.86 — Other biomechanical lesions of lower extremity
  • M99.87 — Other biomechanical lesions of upper extremity
  • M99.88 — Other biomechanical lesions of rib cage
  • M99.89 — Other biomechanical lesions of abdomen and other regions
  • M99.9 — Biomechanical lesion, unspecified