| E72 | Other disorders of amino-acid metabolism | NON-BILLABLE CODE |
| E72.0 | Disorders of amino-acid transport | NON-BILLABLE CODE |
| E72.01 | Cystinuria | BILLABLE CODE |
| E72.02 | Hartnup's disease | BILLABLE CODE |
| E72.03 | Lowe's syndrome | BILLABLE CODE |
| E72.04 | Cystinosis | BILLABLE CODE |
| E72.09 | Other disorders of amino-acid transport | BILLABLE CODE |
| E72.1 | Disorders of sulfur-bearing amino-acid metabolism | NON-BILLABLE CODE |
| E72.10 | Disorders of sulfur-bearing amino-acid metabolism, unspecified | BILLABLE CODE |
| E72.11 | Homocystinuria | BILLABLE CODE |
| E72.12 | Methylenetetrahydrofolate reductase deficiency | BILLABLE CODE |
| E72.19 | Other disorders of sulfur-bearing amino-acid metabolism | BILLABLE CODE |
| E72.2 | Disorders of urea cycle metabolism | NON-BILLABLE CODE |
| E72.20 | Disorder of urea cycle metabolism, unspecified | BILLABLE CODE |
| E72.21 | Argininemia | BILLABLE CODE |
| E72.22 | Arginosuccinic aciduria | BILLABLE CODE |
| E72.23 | Citrullinemia | BILLABLE CODE |
| E72.29 | Other disorders of urea cycle metabolism | BILLABLE CODE |
| E72.3 | Disorders of lysine and hydroxylysine metabolism | BILLABLE CODE |
| E72.4 | Disorders of ornithine metabolism | BILLABLE CODE |
| E72.5 | Disorders of glycine metabolism | NON-BILLABLE CODE |
| E72.50 | Disorder of glycine metabolism, unspecified | BILLABLE CODE |
| E72.51 | Non-ketotic hyperglycinemia | BILLABLE CODE |
| E72.52 | Trimethylaminuria | BILLABLE CODE |
| E72.53 | Primary hyperoxaluria | BILLABLE CODE |
| E72.59 | Other disorders of glycine metabolism | BILLABLE CODE |
| E72.8 | Other specified disorders of amino-acid metabolism | NON-BILLABLE CODE |
| E72.81 | Disorders of gamma aminobutyric acid metabolism | BILLABLE CODE |
| E72.89 | Other specified disorders of amino-acid metabolism | BILLABLE CODE |
| E72.9 | Disorder of amino-acid metabolism, unspecified | BILLABLE CODE |
