Flatback syndrome, lumbar region

This code describes a spinal deformity characterized by the loss of normal lumbar lordosis, resulting in a flattened appearance of the lower back. This loss of natural curvature can lead to an anterior shift in the body's center of gravity, causing compensatory changes and symptoms. Patients often experience difficulty standing upright, back pain, and fatigue.

Use this code when documentation explicitly states "flatback syndrome" affecting the lumbar spine. It is appropriate for both primary and secondary flatback deformities. Supporting documentation should include physician notes detailing the loss of lumbar lordosis and associated clinical findings.

• Ensure the documentation specifies the lumbar region; flatback syndrome can occur in other spinal segments.
• Distinguish from other spinal deformities like kyphosis or scoliosis, which have distinct ICD-10-CM codes.
• Code any associated pain (e.g., M54.5-) or neurological symptoms separately as secondary diagnoses.