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M40.35

Billable

Flatback syndrome, thoracolumbar region

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

A loss of normal forward curvature in the lower thoracic and upper lumbar spine, creating an abnormally flat appearance in that region.

Coding Tips

  • •Flatback syndrome at the thoracolumbar junction is commonly seen after spinal fusion; check for related procedure codes
  • •Confirm the anatomical location through imaging reports or clinical documentation

Code Hierarchy

└M40Kyphosis and lordosis└M40.3Flatback syndrome└M40.35Flatback syndrome, thoracolumbar region
└M40.35Flatback syndrome, thoracolumbar region

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