I15: Secondary hypertension
Codes under I15 (Secondary hypertension). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| I15.0 | Renovascular hypertension | ✓ |
| I15.0 | Renovascular hypertension | ✓ |
| I15.1 | Hypertension secondary to other renal disorders | ✓ |
| I15.1 | Hypertension secondary to other renal disorders | ✓ |
| I15.2 | Hypertension secondary to endocrine disorders | ✓ |
| I15.2 | Hypertension secondary to endocrine disorders | ✓ |
| I15.8 | Other secondary hypertension | ✓ |
| I15.8 | Other secondary hypertension | ✓ |
| I15.9 | Secondary hypertension, unspecified | ✓ |
| I15.9 | Secondary hypertension, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code I15?
I15 is an ICD-10-CM category covering Secondary hypertension. It contains 10 more specific diagnosis codes, 10 of which are billable.
Is I15 a billable code?
No — I15 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example I15.0 — Renovascular hypertension). 10 of the 10 codes under I15 are billable.
What codes fall under I15?
I15 includes I15.0, I15.0, I15.1, I15.1, I15.2, plus 5 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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