E72.2
Disorders of urea cycle metabolism
Clinical Classification Guidelines
Excludes Type 1
- disorders of ornithine metabolism (E72.4)
Medical Intelligence & Overview
Disorders of urea cycle metabolism, classified under ICD-10 code E72.2, are rare genetic conditions that affect how the body processes and eliminates ammonia, a waste product formed when the body breaks down proteins. Proper functioning of the urea cycle is essential for removing excess nitrogen from the body. When this process is impaired, ammonia can accumulate to dangerous levels, leading to serious health issues. These disorders are typically inherited and require medical attention for management and treatment.
Causes & Symptoms
Clinical Causes: Genetic mutations affecting enzymes involved in the urea cycle Inheritance in an autosomal recessive pattern Potential presence of unidentified genetic factors influencing enzyme activity Rare cases where environmental factors or other health conditions may exacerbate symptoms
Key Symptoms: Early signs often appear in the neonatal period or during infancy Vomiting and nausea Lethargy and fatigue Irregular breathing patterns or respiratory distress Seizures or coma in severe cases Irritability and poor feeding in infants Enlarged liver in some cases Progressive neurological symptoms if untreated
Diagnostic & Treatment
Diagnosis Path: Blood tests to measure ammonia levels and serum amino acids Urine tests for orotic acid levels Genetic testing to identify mutations in specific urea cycle enzyme genes Enzyme activity assays when possible Imaging studies such as MRI or CT scans to assess brain impact
Treatment Protocols: Restricting dietary protein intake to minimize ammonia production Use of specialized medical formulas low in protein Medications such as ammonia scavengers (e.g., sodium benzoate, sodium phenylbutyrate) to help remove excess ammonia Liver transplantation in severe cases offering a potential cure Close monitoring of blood ammonia levels Supporting respiratory and neurological functions as needed
Clinical Advice & FAQs
Billing Guidance
Is E72.2 a billable ICD-10 code?
Yes, E72.2 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report E72.2?
Clinical documentation must specify the nature of Disorders of urea cycle metabolism and any associated comorbidities for accurate reporting.
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