2026 ICD-10-CM Diagnosis Code I16Hypertensive crisis

ICD-10-CM Codes›I00–I99›I10-I1A›I16

ICD-10-CM I16
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I16 is a non-billable ICD-10-CM category code for hypertensive crisis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as I16.0, I16.1, and I16.9.

Code Identity

ICD-10-CM Code
I16
Billable Status
No — Non-Billable Category
Code Describes
Hypertensive crisis
Chapter
I10-I1A
Hypertensive diseases

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI10-I1AHypertensive diseases
CategoryI16Hypertensive crisis
This CodeI16Hypertensive crisis

Specific Coding for Hypertensive crisisOverview

Non-specific codes like I16 require more characters. Use one of these billable codes instead:

  • Use I16.0 for Hypertensive urgency

  • Use I16.1 for Hypertensive emergency

  • Use I16.9 for Hypertensive crisis, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Code Also

  • any identified hypertensive disease I10 I15 I1A

Clinical InformationClinical

  • Hypertensive Crisis

    a severe, acute increase in blood pressure that may result in stroke or myocardial ischemia.

Patient EducationClinical

High Blood Pressure

Blood pressure is the force of your blood pushing against the walls of your arteries. Each time your heart beats, it pumps blood into the arteries. Your blood pressure is highest when your heart beats, pumping the blood. This is called systolic pressure. When your heart is at rest, between beats, your blood pressure falls.

The full article covers:

  • What is blood pressure?
  • How is high blood pressure diagnosed?
  • What are the different types of high blood pressure?
  • Why do I need to worry about high blood pressure?
  • What are the treatments for high blood pressure?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About I16Overview

Is I16 (Hypertensive crisis) a billable code?

No. This is a category header that groups the codes for hypertensive crisis, and headers cannot be submitted on claims. Claims for hypertensive crisis need a more specific code from this category, such as I16.0, I16.1, and I16.9.