Unspecified disorder of amino-acid metabolism

This code signifies a metabolic disturbance involving amino acids where the specific type of amino acid or the precise enzymatic defect is unknown. It indicates a general problem with the body's processing of these fundamental building blocks of protein.

Use this code when diagnostic workup strongly suggests an amino acid metabolism disorder, but specific testing (e.g., amino acid quantitative analysis, genetic testing) has not yet identified the exact condition. It is appropriate for initial encounters or when a definitive diagnosis remains elusive despite investigation.

• Avoid using this code if a more specific amino acid metabolism disorder (e.g., phenylketonuria, maple syrup urine disease) has been diagnosed.
• Always query the provider for further specificity if documentation indicates an amino acid disorder without identifying the specific type.
• This code is often a temporary diagnosis while awaiting definitive test results; update to a more specific code once available.