ICD-10-CM > N00-N99 > N25-N29 > N25 N25 Disorders resulting from impaired renal tubular function Non-Billable/Non-Specific Codes N25.0Renal osteodystrophyN25.1Nephrogenic diabetes insipidusN25.8Other disorders resulting from impaired renal tubular functionN25.81Secondary hyperparathyroidism of renal originN25.89Other disorders resulting from impaired renal tubular functionN25.9Disorder resulting from impaired renal tubular function, unspecified