NPI Atlas

N25 – Disorders resulting from impaired renal tubular function

ICD-10-CM 2027 diagnosis code · Other disorders of kidney and ureter

Non-billable header

ICD-10-CM code N25

Code: N25 (claims format: N25)
Description: Disorders resulting from impaired renal tubular function
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 14. Diseases of the genitourinary system (N00-N99)
Block: N25-N29 Other disorders of kidney and ureter

Billable codes under N25

N25 is a header code and cannot be used on claims. Choose the most specific code:

N25.0 – Renal osteodystrophyBillable
N25.1 – Nephrogenic diabetes insipidusBillable
N25.8 – Other disorders resulting from impaired renal tubular functionHeader (more codes below)
N25.9 – Disorder resulting from impaired renal tubular function, unspecifiedBillable

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block N25-N29

Excludes2 (not included here):

disorders of kidney and ureter with urolithiasis (N20-N23)

Frequently asked questions

What is ICD-10 code N25?

N25 is the ICD-10-CM code for disorders resulting from impaired renal tubular function, in the block N25-N29 (Other disorders of kidney and ureter).

Is N25 a billable code?

No. N25 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.