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M40 Kyphosis and lordosis

ICD-10-CM category M40 sits in Chapter 13 (Diseases of the musculoskeletal system and connective tissue, M00-M99). It contains 31 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Subcategories

M40.0 Postural kyphosisM40.1 Other secondary kyphosisM40.2 Other and unspecified kyphosisM40.20 Unspecified kyphosisM40.29 Other kyphosisM40.3 Flatback syndromeM40.4 Postural lordosisM40.5 Lordosis, unspecified

Billable codes in M40

CodeDescription
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

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