Sandhoff disease

This code identifies Sandhoff disease, a rare, inherited neurodegenerative disorder characterized by the accumulation of GM2 gangliosides and related glycolipids in the brain and other tissues. It is a severe form of GM2 gangliosidosis, leading to progressive neurological deterioration, often presenting in infancy with developmental regression, cherry-red spots in the eyes, and macrocephaly.

Assign this code for patients diagnosed with Sandhoff disease, confirmed by genetic testing showing mutations in the HEXB gene or enzymatic assays demonstrating a deficiency of both hexosaminidase A and B. It is appropriate for initial diagnosis and subsequent encounters related to the management of this specific metabolic disorder.

• Ensure documentation clearly specifies Sandhoff disease, distinguishing it from Tay-Sachs disease (HEXA gene mutation).
• Consider additional codes for associated neurological manifestations or complications, such as seizures or respiratory issues.
• This code is highly specific; avoid using more general codes for unspecified lysosomal storage diseases if Sandhoff disease is confirmed.