ICD-10 Code E70.20 – Disorder of tyrosine metabolism, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E70.20 – Disorder of tyrosine metabolism, unspecified
What it is
This code identifies an unspecified inherited disorder affecting tyrosine metabolism. Use it when documentation confirms a tyrosine metabolism disorder but does not name the exact type.
Clinical signs
Clinical features vary; refer to documentation. Patients may have findings consistent with an amino acid metabolism disorder, but the record should support that tyrosine metabolism is involved.
When to use this code
Use E70.20 when the clinician documents a disorder of tyrosine metabolism without further specification. It is appropriate when the diagnosis is confirmed but the subtype is not identified in the chart.
Choose this code for incomplete documentation, pending genetic clarification, or historical problem lists that only state a tyrosine metabolism disorder. Check documentation if the condition is described with a more specific diagnosis.
Do not use for
Do not use this code for unrelated aminoacidopathies, liver disease, or isolated elevated tyrosine without a documented metabolic disorder. Do not code it when a more specific tyrosine disorder is named.
Coding tip
Query the provider for the exact tyrosine disorder whenever the record is vague, because a more specific ICD-10-CM code may be available.