---
title: "ICD-10-CM I10: Essential (primary) hypertension | BillingBrief"
description: "I10 is the code for primary (essential) hypertension. It's one of the most-reported diagnosis codes in primary care."
canonical: "https://billingbrief.com/icd10/i10/"
language: "en"
---

# I10 Essential (primary) hypertension

ICD-10-CM · [CMS code reference](#source)

I10 is the code for primary (essential) hypertension. It's one of the most-reported diagnosis codes in primary care.

## Common questions

### Is I10 a billable code?

Yes. I10 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.

## From the source

Official description from [CMS](https://www.cms.gov/medicare/coding-billing/icd-10-codes).
ICD-10-CM FY2027 (effective October 1, 2026).

Code set

ICD-10-CM

Category

I10 Essential (primary) hypertension

Chapter

Diseases of the circulatory system

Billable

Yes

Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. [About BillingBrief and our sources](https://billingbrief.com/about/).