E74.0
Glycogen storage disease
Clinical Classification Guidelines
Medical Intelligence & Overview
Glycogen Storage Disease (GSD) is a group of inherited metabolic disorders characterized by the body's inability to properly store and release glycogen, a form of stored carbohydrate used for energy. These disorders are caused by enzyme deficiencies that affect how glycogen is synthesized or broken down in the body. GSD can impact various organs, especially the liver and muscles, leading to a range of health issues. The severity and specific symptoms vary depending on the type of GSD, but early diagnosis and management are crucial for optimal health outcomes.
Causes & Symptoms
Clinical Causes: Genetic mutations affecting enzymes involved in glycogen metabolism Inheritance pattern usually autosomal recessive, meaning both parents carry the gene mutation Deficiencies in enzymes such as glucose-6-phosphatase, muscle phosphorylase, or debranching enzyme, depending on the GSD type
Key Symptoms: Enlarged liver (hepatomegaly) Low blood sugar levels (hypoglycemia), especially during fasting or illness Muscle weakness or cramps Delayed growth and development in children Fatigue and exercise intolerance Elevated levels of lactic acid, uric acid, and triglycerides in the blood In some types, increased muscle size or cardiomyopathy
Diagnostic & Treatment
Diagnosis Path: Diagnosis of glycogen storage disease involves a combination of clinical evaluation and laboratory tests. Healthcare providers may perform blood sugar tests, enzyme activity assays, and genetic testing. Imaging studies like ultrasound can assess liver size. Sometimes, a liver biopsy is necessary to examine tissue directly for glycogen accumulation. Accurate diagnosis helps determine the specific type of GSD and guides treatment planning.
Treatment Protocols: Frequent, specialized meals and snacks rich in complex carbohydrates to maintain blood sugar levels Continuous nocturnal feeding or the use of uncooked cornstarch to provide a steady carbohydrate source during fasting periods Avoiding fasting for extended periods Monitoring blood glucose regularly Managing specific symptoms with medications when necessary In some cases, liver or muscle transplantation may be considered if other treatments are insufficient Regular follow-up with a healthcare team experienced in metabolic disorders
Clinical Advice & FAQs
Billing Guidance
Is E74.0 a billable ICD-10 code?
Yes, E74.0 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report E74.0?
Clinical documentation must specify the nature of Glycogen storage disease and any associated comorbidities for accurate reporting.
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