NPI Atlas

N25.81 – Secondary hyperparathyroidism of renal origin

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

Billable code

ICD-10-CM code N25.81

Code: N25.81 (claims format: N2581)
Description: Secondary hyperparathyroidism of renal origin
Billable: Yes – valid for HIPAA-covered transactions
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
Parent codes: N25 › N25.8

Notes for N25.81

Excludes1 (not coded here):

secondary hyperparathyroidism, non-renal (E21.1)

Excludes2 (not included here):

metabolic disorders classifiable to E70-E88

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)

Index terms for N25.81

Entries in the ICD-10-CM alphabetic index that lead to this code:

Hyperparathyroidism, secondary

Related codes in N25.8

N25.89 – Other disorders resulting from impaired renal tubular functionBillable

Frequently asked questions

What is ICD-10 code N25.81?

N25.81 is the ICD-10-CM code for secondary hyperparathyroidism of renal origin, in the block N25-N29 (Other disorders of kidney and ureter).

Is N25.81 a billable code?

Yes. N25.81 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does N25.81 belong to?

It belongs to category N25 – Disorders resulting from impaired renal tubular function.

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.