Progressive spinal muscle atrophy

This code identifies a rare, inherited neuromuscular disorder characterized by the progressive degeneration of anterior horn cells in the spinal cord, leading to muscle weakness and atrophy. It specifically refers to a chronic form of spinal muscular atrophy (SMA) that typically manifests in later childhood or adulthood, with a slower progression compared to infantile or juvenile forms.

Assign this code for patients diagnosed with a slowly progressive form of spinal muscular atrophy. Documentation should clearly indicate the progressive nature of the muscle atrophy and specify that it is not an infantile or juvenile onset type. This code is appropriate when the clinical presentation aligns with adult-onset SMA.

• Differentiate from other forms of SMA (e.g., infantile, juvenile) which have distinct ICD-10-CM codes.
• Ensure documentation specifies "progressive" to support this code over more general muscle atrophy codes.
• Consider sequencing with codes for associated symptoms or complications, such as respiratory compromise or scoliosis, if present.