Other disorders of kidney and ureter (N25-N29)

Instructional notes

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers chronic kidney disease staging, CKD in kidney transplant patients, and sequencing CKD with related conditions such as diabetes and hypertension.

• Chronic kidney disease (page 62)

Read Section I.C.14 (page 62)

All codes under N25-N29

N25-N29 can't be used on a claim. Pick a billable code below; grey headings group them.

• N25Disorders resulting from impaired renal tubular function
• N25.0Renal osteodystrophy
• N25.1Nephrogenic diabetes insipidus
• N25.8Other disorders resulting from impaired renal tubular function
• N25.81Secondary hyperparathyroidism of renal origin
• N25.89Other disorders resulting from impaired renal tubular function
• N25.9Disorder resulting from impaired renal tubular function, unspecified
• N26Unspecified contracted kidney
• N26.1Atrophy of kidney (terminal)
• N26.2Page kidney
• N26.9Renal sclerosis, unspecified
• N27Small kidney of unknown cause
• N27.0Small kidney, unilateral
• N27.1Small kidney, bilateral
• N27.9Small kidney, unspecified
• N28Other disorders of kidney and ureter, not elsewhere classified
• N28.0Ischemia and infarction of kidney
• N28.1Cyst of kidney, acquired
• N28.8Other specified disorders of kidney and ureter
• N28.81Hypertrophy of kidney
• N28.82Megaloureter
• N28.83Nephroptosis
• N28.84Pyelitis cystica
• N28.85Pyeloureteritis cystica
• N28.86Ureteritis cystica
• N28.89Other specified disorders of kidney and ureter
• N28.9Disorder of kidney and ureter, unspecified
• N29Other disorders of kidney and ureter in diseases classified elsewhere

N25-N29 MS-DRGs

This code does not group to an MS-DRG as a principal diagnosis.

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.