Is M99 a billable code?
No. M99 is a header code that groups 91 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
M99: Biomechanical lesions, not elsewhere classified
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
M99 groups related diagnoses under biomechanical lesions, not elsewhere classified. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under M99
- 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
- M99.59Intervertebral disc stenosis of neural canal of abdomen and other regions
- M99.60Osseous and subluxation stenosis of intervertebral foramina of head region
- M99.61Osseous and subluxation stenosis of intervertebral foramina of cervical region
- M99.62Osseous and subluxation stenosis of intervertebral foramina of thoracic region
- M99.63Osseous and subluxation stenosis of intervertebral foramina of lumbar region
- M99.64Osseous and subluxation stenosis of intervertebral foramina of sacral region
- M99.65Osseous and subluxation stenosis of intervertebral foramina of pelvic region
- M99.66Osseous and subluxation stenosis of intervertebral foramina of lower extremity
- M99.67Osseous and subluxation stenosis of intervertebral foramina of upper extremity
- M99.68Osseous and subluxation stenosis of intervertebral foramina of rib cage
- M99.69Osseous and subluxation stenosis of intervertebral foramina of abdomen and other regions
- M99.70Connective tissue and disc stenosis of intervertebral foramina of head region
- M99.71Connective tissue and disc stenosis of intervertebral foramina of cervical region
- M99.72Connective tissue and disc stenosis of intervertebral foramina of thoracic region
- M99.73Connective tissue and disc stenosis of intervertebral foramina of lumbar region
- M99.74Connective tissue and disc stenosis of intervertebral foramina of sacral region
- M99.75Connective tissue and disc stenosis of intervertebral foramina of pelvic region
- M99.76Connective tissue and disc stenosis of intervertebral foramina of lower extremity
- M99.77Connective tissue and disc stenosis of intervertebral foramina of upper extremity
- M99.78Connective tissue and disc stenosis of intervertebral foramina of rib cage
- M99.79Connective tissue and disc stenosis of intervertebral foramina of abdomen and other regions
- M99.80Other biomechanical lesions of head region
- M99.81Other biomechanical lesions of cervical region
- M99.82Other biomechanical lesions of thoracic region
- M99.83Other biomechanical lesions of lumbar region
- M99.84Other biomechanical lesions of sacral region
- M99.85Other biomechanical lesions of pelvic region
- M99.86Other biomechanical lesions of lower extremity
- M99.87Other biomechanical lesions of upper extremity
- M99.88Other biomechanical lesions of rib cage
- M99.89Other biomechanical lesions of abdomen and other regions
- M99.9Biomechanical lesion, unspecified
M99 questions
What does M99 mean?
M99 is the ICD-10-CM code for Biomechanical lesions, not elsewhere classified. It is in chapter 13, Diseases of the musculoskeletal system and connective tissue (M00-M99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.