ICD-10-CM category
M40 Kyphosis and lordosis
M40 is a category, not a billable code. Report one of the 31 complete codes below.
Codes in 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
Outside the US? M40 in the international WHO ICD-10 lists its inclusion and exclusion notes.
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ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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