| E79 | Disorders of purine and pyrimidine metabolism | NON-BILLABLE CODE |
| E79.0 | Hyperuricemia without signs of inflammatory arthritis and tophaceous disease | BILLABLE CODE |
| E79.1 | Lesch-Nyhan syndrome | BILLABLE CODE |
| E79.8 | Other disorders of purine and pyrimidine metabolism | NON-BILLABLE CODE |
| E79.81 | Aicardi-Goutieres syndrome | BILLABLE CODE |
| E79.82 | Hereditary xanthinuria | BILLABLE CODE |
| E79.89 | Other specified disorders of purine and pyrimidine metabolism | BILLABLE CODE |
| E79.9 | Disorder of purine and pyrimidine metabolism, unspecified | BILLABLE CODE |
