Flatback syndrome, lumbosacral region

This code describes flatback syndrome affecting the lumbosacral spine. It is characterized by a loss of the normal lumbar lordosis, resulting in a flattened appearance of the lower back and often leading to sagittal imbalance. Patients typically experience difficulty standing upright, back pain, and compensatory hip or knee flexion.

Use this code when documentation explicitly states a diagnosis of flatback syndrome localized to the lumbosacral region. This diagnosis is often made based on clinical examination and imaging studies (e.g., lateral spine radiographs) demonstrating a reduced or absent lumbar lordosis.

• Ensure documentation specifies "lumbosacral region" to differentiate from other spinal areas.
• Do not confuse with general kyphosis codes unless flatback syndrome is specifically diagnosed.
• Consider co-reporting with codes for associated symptoms like back pain (e.g., M54.5-) or gait abnormalities if documented.