I15Header code — not billable

Secondary hypertension

Chapter
9. Diseases of the circulatory system
Category
I15
Effective date
October 1, 2026

Related codes in category I15

I15.0Renovascular hypertensionYesI15.1Hypertension secondary to other renal disordersYesI15.2Hypertension secondary to endocrine disordersYesI15.8Other secondary hypertensionYesI15.9Secondary hypertension, unspecifiedYes

Frequently asked questions

What is ICD-10 code I15?

I15 is an ICD-10-CM diagnosis code for Secondary hypertension.

Is I15 a billable code?

No. I15 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is I15 in?

I15 falls under Chapter 9: Diseases of the circulatory system.

When did I15 become effective?

I15 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to I15?

I15 belongs to category I15, which includes 5 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.