Flatback syndrome
Flatback syndrome
M40.3 is a header (parent) code in the ICD-10-CM hierarchy. It is not billable for claim submission. Use one of the billable child codes listed below.
Billable codes in this category
Each of the codes below is billable. Choose the one that most accurately describes the patient's diagnosis.
Loss of normal lumbar lordosis resulting in a straight or reversed sagittal spinal alignment, coded here when the specific spinal region is not documented.
Loss of normal lumbar lordosis localized to the thoracolumbar junction (approximately T10–L2), producing a straightened or reversed sagittal contour at that spinal segment.
Flatback syndrome localized to the lumbar region — loss of the normal lumbar lordosis resulting in a straightened or hypolordotic lumbar spine segment.
Flatback syndrome localized to the lumbosacral region — loss of the normal lumbar lordosis at the L5-S1 junction, producing a straightened or reversed sagittal profile.