ICD-10-CM > E00-E89 > E70-E88 > E72 > E72.0 E72.0 Disorders of amino-acid transport Non-Billable/Non-Specific Type 1 Excludes disorders of tryptophan metabolism (E70.5) Codes E72.00Disorders of amino-acid transport, unspecifiedE72.01CystinuriaE72.02Hartnup's diseaseE72.03Lowe's syndromeE72.04CystinosisE72.09Other disorders of amino-acid transport