ICD-10 code for purine metabolism disorder

The ICD-10-CM code for purine metabolism disorder is E79.9 (Disorder of purine and pyrimidine metabolism, unspecified).

Within E79, choose E79.9 (Disorder of purine and pyrimidine metabolism, unspecified) only when documentation doesn't support a more specific option: Hyperuricemia without signs of inflammatory arthritis and tophaceous disease (E79.0), Lesch-Nyhan syndrome (E79.1), Myoadenylate deaminase deficiency (E79.2) and other disorders of purine and pyrimidine metabolism (E79.8).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 642 (Inborn and Other Disorders of Metabolism, relative weight 1.3219), in MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.