M99
M99: Biomechanical lesions, not elsewhere classified
Non-billable headerICD-10-CM
M99 is a non-billable header ICD-10-CM code for biomechanical lesions, not elsewhere classified. It cannot be billed on its own: choose one of the more specific child codes below.
Notes
Additional guidance from the ICD-10-CM tabular list.
- This category should not be used if the condition can be classified elsewhere.
Other codes that can never be billed with M99
Their own Excludes1 notes name this code, so the conflict is not listed above.
- M43.5Other recurrent vertebral dislocation
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead M99
10 child codes. Green means billable.
- M99.0Segmental and somatic dysfunction
- M99.1Subluxation complex (vertebral)
- M99.2Subluxation stenosis of neural canal
- M99.3Osseous stenosis of neural canal
- M99.4Connective tissue stenosis of neural canal
- M99.5Intervertebral disc stenosis of neural canal
- M99.6Osseous and subluxation stenosis of intervertebral foramina
- M99.7Connective tissue and disc stenosis of intervertebral foramina
- M99.8Other biomechanical lesions
- M99.9Biomechanical lesion, unspecified