ICD-10-CM > M00-M99 > M40-M43 > M40 M40 Kyphosis and lordosis Non-Billable/Non-Specific Code First underlying disease Type 1 Excludes congenital kyphosis and lordosis (Q76.4)kyphoscoliosis (M41.-)postprocedural kyphosis and lordosis (M96.-) Codes M40.0Postural kyphosisM40.00Postural kyphosis, site unspecifiedM40.03Postural kyphosis, cervicothoracic regionM40.04Postural kyphosis, thoracic regionM40.05Postural kyphosis, thoracolumbar regionM40.1Other secondary kyphosisM40.10Other secondary kyphosis, site unspecifiedM40.12Other secondary kyphosis, cervical regionM40.13Other secondary kyphosis, cervicothoracic regionM40.14Other secondary kyphosis, thoracic regionM40.15Other secondary kyphosis, thoracolumbar regionM40.2Other and unspecified kyphosisM40.20Unspecified kyphosisM40.202Unspecified kyphosis, cervical regionM40.203Unspecified kyphosis, cervicothoracic regionM40.204Unspecified kyphosis, thoracic regionM40.205Unspecified kyphosis, thoracolumbar regionM40.209Unspecified kyphosis, site unspecifiedM40.29Other kyphosisM40.292Other kyphosis, cervical regionM40.293Other kyphosis, cervicothoracic regionM40.294Other kyphosis, thoracic regionM40.295Other kyphosis, thoracolumbar regionM40.299Other kyphosis, site unspecifiedM40.3Flatback syndromeM40.30Flatback syndrome, site unspecifiedM40.35Flatback syndrome, thoracolumbar regionM40.36Flatback syndrome, lumbar regionM40.37Flatback syndrome, lumbosacral regionM40.4Postural lordosisM40.40Postural lordosis, site unspecifiedM40.45Postural lordosis, thoracolumbar regionM40.46Postural lordosis, lumbar regionM40.47Postural lordosis, lumbosacral regionM40.5Lordosis, unspecifiedM40.50Lordosis, unspecified, site unspecifiedM40.55Lordosis, unspecified, thoracolumbar regionM40.56Lordosis, unspecified, lumbar regionM40.57Lordosis, unspecified, lumbosacral region