Limb girdle musc dyst due to fukutin related protein dysfnct

This code identifies a specific type of limb-girdle muscular dystrophy (LGMD) characterized by progressive weakness and wasting of muscles around the hips and shoulders. It is genetically linked to mutations in the fukutin-related protein (FKRP) gene, leading to a defect in glycosylation of alpha-dystroglycan. This dysfunction results in a range of clinical presentations, from severe congenital forms to milder adult-onset LGMD.

Use this code when documentation clearly indicates a diagnosis of limb-girdle muscular dystrophy and specifies that the underlying genetic cause is a fukutin-related protein (FKRP) dysfunction. This diagnosis is typically confirmed through genetic testing identifying FKRP mutations, or a muscle biopsy showing characteristic dystrophic changes along with immunohistochemical evidence of abnormal alpha-dystroglycan glycosylation.

• Ensure documentation explicitly states "fukutin related protein dysfunction" or "FKRP mutation" as the cause of the LGMD.
• Do not use this code for other genetic causes of limb-girdle muscular dystrophy; specific codes exist for other genetic subtypes.
• Consider sequencing additional codes for associated symptoms or complications, such as cardiomyopathy or respiratory insufficiency, if present and documented.