E75.00
BillableGM2 gangliosidosis, unspecified
HCC Category Mapping
RxHCCHCC 41 — Lysosomal Storage Disorders
0.000What This Code Means
GM2 gangliosidosis is a rare inherited metabolic disorder where harmful fatty substances accumulate in nerve cells and the brain, causing progressive neurological damage. This unspecified code is used when the specific type of GM2 gangliosidosis (such as Tay-Sachs or Sandhoff disease) has not been identified.
Coding Tips
- •If the specific type of GM2 gangliosidosis is documented (Tay-Sachs disease, Sandhoff disease, or GM2 activator deficiency), use the more specific subcategories E75.01, E75.02, or E75.03 instead of the unspecified code
- •This is a genetic disorder; consider coding the family history and any associated neurological manifestations (developmental delay, seizures, blindness) as secondary diagnoses to provide complete clinical documentation
Clinical Significance
GM2 gangliosidosis, unspecified, indicates a diagnosed GM2 gangliosidosis without specification of the variant (Tay-Sachs, Sandhoff, or AB variant). These are devastating lysosomal storage disorders causing progressive neurological deterioration due to accumulation of GM2 gangliosides in neurons. Identifying the specific variant is critical for genetic counseling and management planning.
Documentation Requirements
- ✓Provider diagnosis of GM2 gangliosidosis
- ✓Enzyme assay results: hexosaminidase A and B activity levels
- ✓Documentation of why specific type has not been determined
- ✓Neurological assessment documenting current functional status
- ✓Family history and genetic counseling status
Commonly Confused Codes
E75.02 — Tay-Sachs disease: specific GM2 gangliosidosis with hexosaminidase A deficiencyE75.01 — Sandhoff disease: specific GM2 gangliosidosis with hexosaminidase A and B deficiencyE75.09 — Other GM2 gangliosidosis: for GM2 activator protein deficiency (AB variant)E75.10 — Unspecified gangliosidosis: even less specific, covering all gangliosidosis typesE75.19 — Other gangliosidosis: for non-GM2 gangliosidoses
Code Hierarchy
└E75Disorders of sphingolipid metabolism and other lipid storage disorders└E75.0GM2 gangliosidosis└E75.00GM2 gangliosidosis, unspecified
└E75.00GM2 gangliosidosis, unspecified