Other disorders of sulfur-bearing amino-acid metabolism

This code signifies a group of rare, inherited metabolic disorders affecting the body's ability to process sulfur-containing amino acids, such as methionine and cysteine, other than homocystinuria or cystinuria. These conditions can lead to the accumulation of toxic byproducts or deficiencies of essential compounds, impacting various organ systems.

Use this code when documentation specifies a diagnosis of a sulfur-bearing amino acid metabolism disorder that is not homocystinuria (E72.11) or cystinuria (E72.04). Examples include hypermethioninemia, sulfite oxidase deficiency, or gamma-glutamylcysteine synthetase deficiency. The physician's diagnostic statement should clearly identify the specific "other" disorder.

• Ensure the documentation explicitly rules out homocystinuria (E72.11) and cystinuria (E72.04) before assigning this code.
• Always review the medical record for specific enzyme deficiencies or metabolic pathway disruptions to confirm the "other" classification.
• If a more specific code for a sulfur-bearing amino acid metabolism disorder exists and is documented, use that code instead.