E70.20
Disorder of tyrosine metabolism, unspecified
Clinical Classification Guidelines
Medical Intelligence & Overview
Disorders of tyrosine metabolism are rare inherited conditions that affect how the body processes the amino acid tyrosine. Tyrosine is an important building block for proteins and is involved in the production of important substances like dopamine, adrenaline, and noradrenaline. When these metabolic processes are disrupted, it can lead to a buildup of certain substances in the body, potentially causing a variety of health issues. The ICD-10 code E70.20 specifically refers to an unspecified disorder of tyrosine metabolism, indicating that the exact subtype or cause has not been specifically identified or classified.
Causes & Symptoms
Clinical Causes: Genetic mutations affecting enzymes responsible for breaking down tyrosine Inherited metabolic disorders transmitted in an autosomal recessive pattern Enzyme deficiencies, such as tyrosine aminotransferase deficiency or other associated enzymatic blocks In some cases, environmental factors or other metabolic disturbances may influence the severity or presentation
Key Symptoms: Elevated levels of tyrosine and related metabolites in the blood and urine Possible development of skin conditions like skin discoloration or eczema Digestive issues, including nausea or vomiting in some cases Developmental delays or cognitive difficulties (more common in specific subtypes) Potential liver problems or hepatomegaly (enlarged liver) Muscle weakness or fatigue Unexplained intellectual disabilities or behavioral problems
Diagnostic & Treatment
Diagnosis Path: Blood tests to measure levels of tyrosine and related compounds Urine tests to detect abnormal metabolites associated with tyrosine breakdown Enzyme activity assays to identify specific deficiencies Genetic testing to identify mutations in relevant genes
Treatment Protocols: Dietary modifications to restrict high-tyrosine foods, such as proteins found in meat, dairy, and certain vegetables Use of medications or supplements to support enzyme activity or support metabolic processes Regular monitoring of blood and urine metabolites to assess treatment effectiveness Supportive therapies for any developmental or neurological issues In some cases, liver transplantation may be considered if liver function is significantly affected
Clinical Advice & FAQs
Billing Guidance
Is E70.20 a billable ICD-10 code?
Yes, E70.20 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report E70.20?
Clinical documentation must specify the nature of Disorder of tyrosine metabolism, unspecified and any associated comorbidities for accurate reporting.
Cite this Clinical Reference