Is M40 a billable code?
No. M40 is a header code that groups 31 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
M40: Kyphosis and lordosis
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
M40 groups related diagnoses under kyphosis and lordosis. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under M40
- M40.00Postural kyphosis, site unspecified
- M40.03Postural kyphosis, cervicothoracic region
- M40.04Postural kyphosis, thoracic region
- M40.05Postural kyphosis, thoracolumbar region
- M40.10Other secondary kyphosis, site unspecified
- M40.12Other secondary kyphosis, cervical region
- M40.13Other secondary kyphosis, cervicothoracic region
- M40.14Other secondary kyphosis, thoracic region
- M40.15Other secondary kyphosis, thoracolumbar region
- M40.202Unspecified kyphosis, cervical region
- M40.203Unspecified kyphosis, cervicothoracic region
- M40.204Unspecified kyphosis, thoracic region
- M40.205Unspecified kyphosis, thoracolumbar region
- M40.209Unspecified kyphosis, site unspecified
- M40.292Other kyphosis, cervical region
- M40.293Other kyphosis, cervicothoracic region
- M40.294Other kyphosis, thoracic region
- M40.295Other kyphosis, thoracolumbar region
- M40.299Other kyphosis, site unspecified
- M40.30Flatback syndrome, site unspecified
- M40.35Flatback syndrome, thoracolumbar region
- M40.36Flatback syndrome, lumbar region
- M40.37Flatback syndrome, lumbosacral region
- M40.40Postural lordosis, site unspecified
- M40.45Postural lordosis, thoracolumbar region
- M40.46Postural lordosis, lumbar region
- M40.47Postural lordosis, lumbosacral region
- M40.50Lordosis, unspecified, site unspecified
- M40.55Lordosis, unspecified, thoracolumbar region
- M40.56Lordosis, unspecified, lumbar region
- M40.57Lordosis, unspecified, lumbosacral region
M40 questions
What does M40 mean?
M40 is the ICD-10-CM code for Kyphosis and lordosis. 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.