Defects in glycoprotein degradation

This code signifies a group of inherited metabolic disorders characterized by the body's inability to properly break down glycoproteins. These conditions result from deficiencies in specific enzymes required for the lysosomal degradation of complex carbohydrate chains attached to proteins, leading to the accumulation of undegraded or partially degraded glycoproteins within cells. This accumulation can cause a wide range of systemic symptoms affecting multiple organ systems.

Use this code for patients diagnosed with specific glycoprotein storage diseases, such as fucosidosis, alpha-mannosidosis, aspartylglucosaminuria, or Sialidosis (mucolipidosis I). Documentation should clearly state the specific glycoprotein degradation defect identified through genetic testing, enzyme assays, or clinical presentation consistent with these rare lysosomal storage disorders.

• Ensure the specific type of glycoprotein degradation defect is documented; this code is a general category.
• Consider sequencing this code as a primary diagnosis when it is the main reason for the encounter or hospitalization.
• Review documentation for associated manifestations or complications (e.g., neurological impairment, skeletal abnormalities) and code them additionally.