ICD-10 Code E72.9 – Disorder of amino-acid metabolism, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E72.9 – Disorder of amino-acid metabolism, unspecified
What it is
E72.9 identifies an unspecified disorder affecting amino-acid metabolism. Use it when documentation confirms an amino-acid metabolic problem but does not name a specific inherited or acquired condition.
Clinical signs
Clinical features vary; refer to documentation. Patients may have signs of metabolic dysfunction, developmental concerns, feeding problems, or abnormal amino-acid findings, but the record should support the diagnosis.
When to use this code
Use E72.9 when the provider documents a disorder of amino-acid metabolism without further detail. It is also appropriate when the specific amino-acid defect is not identified in the available record. Do not guess a more specific code.
Do not use for
Do not use this code for a clearly named amino-acid disorder with a specific ICD-10 code. Also avoid it when the chart only shows abnormal labs or suspected metabolic disease without a confirmed diagnosis.
Coding tip
Code the most specific amino-acid metabolic diagnosis documented, and use E72.9 only when the provider leaves the condition unspecified.