ICD-10 Code E70.2 – Disorders of tyrosine metabolism (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E70.2 – Disorders of tyrosine metabolism
What it is
E70.2 identifies inherited disorders in which the body cannot properly break down tyrosine, an amino acid. These conditions are usually due to enzyme defects and may cause toxic metabolite buildup.
Clinical signs
Clinical features vary; refer to documentation. Findings may include developmental delay, liver involvement, neurologic symptoms, or eye findings, depending on the specific tyrosine disorder.
When to use this code
Use E70.2 when the provider documents a disorder of tyrosine metabolism, such as tyrosinemia or another confirmed tyrosine catabolic defect. Code it from the documented diagnosis, not from isolated screening results. If the record names a specific subtype, follow that documentation.
Do not use for
Do not use this code for nonspecific amino acid abnormalities without a documented tyrosine metabolism disorder. Check documentation if the chart only mentions elevated tyrosine or a metabolic screen without a confirmed diagnosis.
Coding tip
Verify the exact inherited disorder named in the record and code the most specific diagnosis available.