ICD-10-CM 2027
ICD-10 code for secondary renal hyperparathyroidism
Secondary hyperparathyroidism of renal origin
From the official ICD-10-CM alphabetic index entry “Hyperparathyroidism › secondary (renal)”. Page updated September 29, 2026.
About coding secondary renal hyperparathyroidism
The ICD-10-CM code for secondary renal hyperparathyroidism is N25.81 (Secondary hyperparathyroidism of renal origin). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on N25.81.
Within N25.8 (other disorders resulting from impaired renal tubular function), N25.81 is specifically for secondary hyperparathyroidism of renal origin. Related codes cover other disorders resulting from impaired renal tubular function (N25.89).
Don't report N25.81 together with the conditions in its Excludes1 note: secondary hyperparathyroidism, non-renal (E21.1).
The conditions in its Excludes2 note aren't part of N25.81, but may be coded alongside it if the patient has both: metabolic disorders classifiable to E70-E88.
More specific secondary renal hyperparathyroidism codes (official index)
- non-renal E21.1 — Secondary hyperparathyroidism, not elsewhere classified
Don't confuse with (Excludes1 for N25.81)
- secondary hyperparathyroidism, non-renal (E21.1)
Common questions about secondary renal hyperparathyroidism ICD-10 codes
What is the ICD-10 code for secondary renal hyperparathyroidism?
- N25.81 — Secondary hyperparathyroidism of renal origin. More specific codes apply when the documentation supports them: E21.1.
What is the ICD-10 code for non-renal secondary renal hyperparathyroidism?
- E21.1 — Secondary hyperparathyroidism, not elsewhere classified.
Is N25.81 billable?
- Yes. N25.81 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N25.81 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N25.81 as a principal diagnosis.
Is N25.81 a CC or MCC?
- N25.81 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.