Disorders resulting from impaired renal tubular function (N25) ICD-10-CM
The N25 code range covers disorders resulting from impaired renal tubular function with 7 ICD-10-CM diagnosis codes. 5 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Codes in the N25 Range 7 codes · 5 billable
- N25 Disorders resulting from impaired renal tubular functionNon-billable
- N25.0 Renal osteodystrophy
- N25.1 Nephrogenic diabetes insipidus
- N25.8 Other disorders resulting from impaired renal tubular functionNon-billable
- N25.81 Secondary hyperparathyroidism of renal origin
- N25.89 Other disorders resulting from impaired renal tubular function
- N25.9 Disorder resulting from impaired renal tubular function, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the N25 range.
Azotemia
A biochemical abnormality referring to an elevation of BLOOD UREA NITROGEN and CREATININE. Azotemia can be produced by KIDNEY DISEASES or other extrarenal disorders. When azotemia becomes associated with a constellation of clinical signs, it is termed UREMIA.
Gitelman Syndrome
An inherited renal disorder characterized by defective NaCl reabsorption in the convoluted DISTAL KIDNEY TUBULE leading to HYPOKALEMIA. In contrast with BARTTER SYNDROME, Gitelman syndrome includes hypomagnesemia and normocalcemic hypocalciuria, and is caused by mutations in the thiazide-sensitive SODIUM-POTASSIUM-CHLORIDE SYMPORTERS.
About the N25 Code Range
The ICD-10 code N25 covers disorders arising from impaired renal tubular function, which affect the kidney’s ability to handle essential substances. This section includes specific codes for conditions like renal osteodystrophy (N25.0) and nephrogenic diabetes insipidus (N25.1), providing precise coding options for these renal tubular-related diseases.
The ICD-10 code for renal osteodystrophy (N25.0) addresses kidney-related bone disorders caused by abnormal mineral and bone metabolism, often linked to chronic kidney disease and secondary hyperparathyroidism. This condition is also known by several synonymous terms including Sagliker syndrome and chronic kidney disease mineral and bone disorder, helping healthcare providers select the correct code when coding for these presentations. N25.1 identifies nephrogenic diabetes insipidus, a condition characterized by resistance to vasopressin and resultant excessive urination, with synonyms such as hereditary vasopressin resistance aiding in accurate code assignment. Codes like N25.81 specify secondary hyperparathyroidism of renal origin, while N25.89 and N25.9 cover other and unspecified disorders caused by renal tubular impairment, including various tubular acidoses and inherited tubulopathies. Using these detailed codes ensures proper documentation and tracking of renal tubular dysfunctions in clinical practice.
Questions About This Page
How many billable codes are in the N25 range?
Of the 7 codes in this range, 5 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the N25 range classify?
The range classifies disorders resulting from impaired renal tubular function. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
