E72.23
Citrullinemia
Clinical Classification Guidelines
Medical Intelligence & Overview
Citrullinemia is a rare inherited disorder that affects the body's ability to remove ammonia from the bloodstream. Ammonia is a waste product formed when the body breaks down proteins. Normally, it is processed by the liver and eliminated from the body. In individuals with citrullinemia, this process is disrupted, leading to an accumulation of ammonia, a condition known as hyperammonemia. This buildup can be toxic, especially to the brain, and requires prompt diagnosis and management. Citrullinemia falls under the category of urea cycle disorders, which are a group of rare metabolic conditions involving the body's inability to properly eliminate ammonia.
Causes & Symptoms
Clinical Causes: Genetic mutations affecting the ASS1 gene, which provides instructions for making the enzyme argininosuccinate synthetase. Inheritance pattern is autosomal recessive, meaning a person needs to inherit the defective gene from both parents to develop the disorder. In some cases, mutations might be more prevalent in certain populations due to genetic factors. Environmental factors have minimal direct influence, but stressors like illness or fasting may exacerbate symptoms by increasing ammonia production.
Key Symptoms: Vomiting and poor appetite Lethargy and fatigue Irritability or unexplained fussiness in infants Encephalopathy, which can cause confusion, loss of cognition, or coma in severe cases Poor muscle tone (hypotonia) Seizures in advanced stages Developmental delays or intellectual disabilities if untreated
Diagnostic & Treatment
Diagnosis Path: Diagnosing citrullinemia involves a combination of clinical evaluation and laboratory tests. Initial suspicion may arise from symptoms, especially in newborns or infants. Confirmatory diagnosis includes:
Treatment Protocols: Managing citrullinemia focuses on reducing ammonia levels and preventing complications. Treatment strategies may include:
Clinical Advice & FAQs
Billing Guidance
Is E72.23 a billable ICD-10 code?
Yes, E72.23 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report E72.23?
Clinical documentation must specify the nature of Citrullinemia and any associated comorbidities for accurate reporting.
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