M99 — Biomechanical lesions, not elsewhere classified
Not billable
Is M99 billable?
No — M99 is a non-billable header code. M99 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 60 billable codes beneath M99.
Billable codes under this header
- M99.9Biomechanical lesion, unspecified
- M99.00Segmental and somatic dysfunction of head region
- M99.01Segmental and somatic dysfunction of cervical region
- M99.02Segmental and somatic dysfunction of thoracic region
- M99.03Segmental and somatic dysfunction of lumbar region
- M99.04Segmental and somatic dysfunction of sacral region
- M99.05Segmental and somatic dysfunction of pelvic region
- M99.06Segmental and somatic dysfunction of lower extremity
- M99.07Segmental and somatic dysfunction of upper extremity
- M99.08Segmental and somatic dysfunction of rib cage
- M99.09Segmental and somatic dysfunction of abdomen and other regions
- M99.10Subluxation complex (vertebral) of head region
- M99.11Subluxation complex (vertebral) of cervical region
- M99.12Subluxation complex (vertebral) of thoracic region
- M99.13Subluxation complex (vertebral) of lumbar region
- M99.14Subluxation complex (vertebral) of sacral region
- M99.15Subluxation complex (vertebral) of pelvic region
- M99.16Subluxation complex (vertebral) of lower extremity
- M99.17Subluxation complex (vertebral) of upper extremity
- M99.18Subluxation complex (vertebral) of rib cage
- M99.19Subluxation complex (vertebral) of abdomen and other regions
- M99.20Subluxation stenosis of neural canal of head region
- M99.21Subluxation stenosis of neural canal of cervical region
- M99.22Subluxation stenosis of neural canal of thoracic region
- M99.23Subluxation stenosis of neural canal of lumbar region
- M99.24Subluxation stenosis of neural canal of sacral region
- M99.25Subluxation stenosis of neural canal of pelvic region
- M99.26Subluxation stenosis of neural canal of lower extremity
- M99.27Subluxation stenosis of neural canal of upper extremity
- M99.28Subluxation stenosis of neural canal of rib cage
- M99.29Subluxation stenosis of neural canal of abdomen and other regions
- M99.30Osseous stenosis of neural canal of head region
- M99.31Osseous stenosis of neural canal of cervical region
- M99.32Osseous stenosis of neural canal of thoracic region
- M99.33Osseous stenosis of neural canal of lumbar region
- M99.34Osseous stenosis of neural canal of sacral region
- M99.35Osseous stenosis of neural canal of pelvic region
- M99.36Osseous stenosis of neural canal of lower extremity
- M99.37Osseous stenosis of neural canal of upper extremity
- M99.38Osseous stenosis of neural canal of rib cage
- M99.39Osseous stenosis of neural canal of abdomen and other regions
- M99.40Connective tissue stenosis of neural canal of head region
- M99.41Connective tissue stenosis of neural canal of cervical region
- M99.42Connective tissue stenosis of neural canal of thoracic region
- M99.43Connective tissue stenosis of neural canal of lumbar region
- M99.44Connective tissue stenosis of neural canal of sacral region
- M99.45Connective tissue stenosis of neural canal of pelvic region
- M99.46Connective tissue stenosis of neural canal of lower extremity
- M99.47Connective tissue stenosis of neural canal of upper extremity
- M99.48Connective tissue stenosis of neural canal of rib cage
- M99.49Connective tissue stenosis of neural canal of abdomen and other regions
- M99.50Intervertebral disc stenosis of neural canal of head region
- M99.51Intervertebral disc stenosis of neural canal of cervical region
- M99.52Intervertebral disc stenosis of neural canal of thoracic region
- M99.53Intervertebral disc stenosis of neural canal of lumbar region
- M99.54Intervertebral disc stenosis of neural canal of sacral region
- M99.55Intervertebral disc stenosis of neural canal of pelvic region
- M99.56Intervertebral disc stenosis of neural canal of lower extremity
- M99.57Intervertebral disc stenosis of neural canal of upper extremity
- M99.58Intervertebral disc stenosis of neural canal of rib cage
M99 at a glance
| Code | M99 |
|---|---|
| Description | Biomechanical lesions, not elsewhere classified |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Note
- This category should not be used if the condition can be classified elsewhere.
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M99, but a patient may have both at the same time. When documentation supports it, M99 and the excluded code may both be reported.
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
What codes fall under M99? (10)
- M99.0Segmental and somatic dysfunctionnot billable
- M99.1Subluxation complex (vertebral)not billable
- M99.2Subluxation stenosis of neural canalnot billable
- M99.3Osseous stenosis of neural canalnot billable
- M99.4Connective tissue stenosis of neural canalnot billable
- M99.5Intervertebral disc stenosis of neural canalnot billable
- M99.6Osseous and subluxation stenosis of intervertebral foraminanot billable
- M99.7Connective tissue and disc stenosis of intervertebral foraminanot billable
- M99.8Other biomechanical lesionsnot billable
- M99.9Biomechanical lesion, unspecified
How long has M99 existed?
M99 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with M99?
ICD-10-CM declares these codes mutually exclusive with M99 — exactly one of each pair can be correct for a given encounter.