Disorder of branched-chain amino-acid metabolism, unsp

This code represents a metabolic disorder affecting the breakdown of branched-chain amino acids (leucine, isoleucine, and valine) where the specific type of disorder has not been identified. These conditions can lead to the accumulation of toxic byproducts, impacting various organ systems, particularly the brain.

Use this code when documentation indicates a confirmed or suspected disorder of branched-chain amino acid metabolism, but the physician has not specified the exact type (e.g., Maple Syrup Urine Disease, Isovaleric Acidemia, Methylmalonic Acidemia). This is often an interim code used while further diagnostic testing is pending or when the specific diagnosis remains elusive.

• Avoid using this code if a more specific diagnosis, such as E71.0 (Maple Syrup Urine Disease) or E71.110 (Isovaleric acidemia), is documented.
• Query the provider for clarification if the documentation suggests a specific branched-chain amino acid disorder but uses vague terminology.
• Consider sequencing this code as a primary diagnosis when it is the main reason for the encounter, or as a secondary diagnosis when it is a comorbidity.