E72.51
Non-ketotic hyperglycinemia
Clinical Classification Guidelines
Medical Intelligence & Overview
Non-ketotic hyperglycinemia (NKH), also known as glycine encephalopathy, is a rare inherited disorder characterized by an imbalance of the amino acid glycine in the body. This condition affects the central nervous system, leading to various neurological challenges. Due to its genetic roots and impact on brain function, early diagnosis and management are crucial for improving quality of life.
Causes & Symptoms
Clinical Causes: Genetic mutations affecting the glycine cleavage system, which normally helps break down glycine in the body. Inheritance pattern follows an autosomal recessive trait, meaning both parents must carry a copy of the altered gene. Mutations in the GLDC gene (most common), as well as AMT and GCSH genes, are associated with this disorder.
Key Symptoms: Low muscle tone (hypotonia) Seizures that can be difficult to control Lethargy or decreased alertness Poor feeding and failure to thrive Abnormal eye movements Developmental delays or regression Hypersensitivity to stimuli, such as light or sound Possible breathing difficulties
Diagnostic & Treatment
Diagnosis Path: Diagnosis primarily involves blood and cerebrospinal fluid (CSF) analysis to measure glycine levels. Elevated glycine concentrations in both blood and CSF are typical findings. Additional tests may include genetic testing to identify mutations related to the disorder. brain imaging studies, like MRI, can reveal structural brain anomalies, but they are not definitive for NKH. Early recognition through biochemical and genetic testing is essential for accurate diagnosis.
Treatment Protocols: Medications such as sodium benzoate, which helps reduce glycine levels by promoting its excretion. Anticonvulsant drugs to control seizure activity. Supportive therapies, including physical, occupational, and speech therapy, to aid in developmental progress. Nutritional support to address feeding difficulties. Monitoring and managing breathing issues, if present. Regular developmental assessments to tailor supportive care over time.
Clinical Advice & FAQs
Billing Guidance
Is E72.51 a billable ICD-10 code?
Yes, E72.51 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report E72.51?
Clinical documentation must specify the nature of Non-ketotic hyperglycinemia and any associated comorbidities for accurate reporting.
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