ICD-10-CM > N00-N99 > N25-N29 > N25 > N25.8 > N25.81 N25.81 Secondary hyperparathyroidism of renal origin Billable/Specific Copy Code Copy Description Type 1 Excludes secondary hyperparathyroidism, non-renal (E21.1) Type 2 Excludes metabolic disorders classifiable to E70-E88