2026 ICD-10-CM Diagnosis Code I11.9Hypertensive heart disease without heart failure

ICD-10-CM Codes›I00–I99›I10-I1A›I11

ICD-10-CM I11.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I11.9 is a billable ICD-10-CM diagnosis code for hypertensive heart disease without heart failure. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 304 through 305. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Hypertension with complications and secondary hypertension.

This medical diagnosis code is frequently used in Cardiology medical specialties to designate conditions such heart failure.

Code Identity

ICD-10-CM Code
I11.9
Billable Status
Yes — Valid for Submission
Code Describes
Hypertensive heart disease without heart failure
Short Description
Hypertensive heart disease without heart failure
Same as the full description in the CMS dataset.
Parent Code
I11
Hypertensive heart disease

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI10-I1AHypertensive diseases
CategoryI11Hypertensive heart disease
This CodeI11.9Hypertensive heart disease without heart failure

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Benign hypertensive heart disease
  • Benign hypertensive heart disease without congestive heart failure
  • Cardiomegaly
  • Cardiomegaly due to hypertension
  • Cardiomyopathy due to hypertension
  • Coronary sinus hypertension as complication of procedure
  • Hypertension complicating pregnancy, childbirth and the puerperium
  • Hypertensive heart disease
  • Hypertensive heart disease complicating AND/OR reason for care during childbirth
  • Hypertensive heart disease complicating AND/OR reason for care during pregnancy
  • Hypertensive heart disease in obstetric context
  • Hypertensive heart disease without congestive heart failure
  • Hypertensive left ventricular hypertrophy
  • Left ventricular hypertrophy
  • Malignant hypertensive heart disease
  • Malignant hypertensive heart disease without congestive heart failure
  • Pre-existing hypertensive heart disease complicating pregnancy, childbirth and the puerperium
  • Pre-existing hypertensive heart disease in mother complicating childbirth
  • Pre-existing hypertensive heart disease in mother complicating pregnancy
  • Right ventricular hypertension

Tabular List NotesGuidance

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

Inclusion Terms

  • Hypertensive heart disease NOS

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Hypertension, hypertensive(accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)
      • heart (disease) (conditions in I51.4-I51.9 due to hypertension)

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR CIR008
Hypertension with complications and secondary hypertension
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Cardiomegaly

    enlargement of the heart, usually indicated by a cardiothoracic ratio above 0.50. heart enlargement may involve the right, the left, or both heart ventricles or heart atria. cardiomegaly is a nonspecific symptom seen in patients with chronic systolic heart failure (heart failure) or several forms of cardiomyopathies.

  • Cardiomegaly, Exercise-Induced

    non-pathological heart enlargement and other remodeling in cardiac morphology and electrical circuitry found in individuals who participate in intense repeated exercises.

  • Left Ventricular Hypertrophy

    enlargement or overgrowth of the myocardium of the left ventricle, due to chronic pressure overload.

  • Left Ventricular Hypertrophy by ECG Finding|LEFT VENTRICULAR HYPERTROPHY|Left Ventricular Hypertrophy|Left Ventricular Hypertrophy by EKG Finding

    an electrocardiographic finding suggestive of a hypertrophied left ventricle, characterized by large qrs amplitudes and secondary findings of left atrial enlargement, left axis deviation, or typical pattern of st depression and t wave inversion. (cdisc)

  • Left Ventricular Hypertrophy with Strain

    a finding of left ventricular hypertrophy based on the analysis of diagnostic metrics that may indicate a higher risk for cardiovascular events.

  • Left Ventricular Hypertrophy with Strain by ECG Finding|LEFT VENTRICULAR HYPERTROPHY WITH STRAIN|Left Ventricular Hypertrophy With Strain|Left Ventricular Hypertrophy with Strain by EKG Finding

    an electrocardiographic finding suggestive of a hypertrophied left ventricle, characterized by large qrs amplitudes, st depression and t wave inversion. (cdisc)

  • Voltage Criteria Suggesting Left Ventricular Hypertrophy, Without Secondary ECG Findings|VOLTAGE CRITERIA SUGGESTING LEFT VENTRICULAR HYPERTROPHY, WITHOUT SECONDARY ECG FINDINGS

    an electrocardiographic finding of large qrs amplitudes that may indicate left ventricular hypertrophy, but is without any of the secondary findings that are typically seen with this diagnosis: left atrial enlargement, left axis deviation, or typical pattern of st depression and t wave inversion.

Patient EducationClinical

Heart Diseases

Heart disease is a general term that includes many types of heart problems. It's a type of cardiovascular disease, which means heart and blood vessel disease.

The full article covers:

  • What is heart disease?
  • What are the types of heart disease?
  • What causes heart diseases?
  • Who is more likely to develop heart diseases?
  • What are the symptoms of heart disease?
  • How are heart diseases diagnosed?
  • What are the treatments for heart disease?
  • Can heart diseases be prevented?

Read the full article at MedlinePlus

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

Convert I11.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
402.00 Mal hyp ht dis w/o hf
Approximate The match is approximate rather than exact.
ICD-9-CM
402.10 Benign hyp ht dis w/o hf
Approximate The match is approximate rather than exact.
ICD-9-CM
402.90 Hyp hrt dis NOS w/o hf
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About I11.9Overview

Is I11.9 (Hypertensive heart disease) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report hypertensive heart disease without heart failure on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does I11.9 group to?

When hypertensive heart disease without heart failure is the principal diagnosis on an inpatient stay, it groups to MS-DRG 304, 305, with relative weights from 0.7551 to 1.1900 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of I11.9?

Under the General Equivalence Mappings, hypertensive heart disease without heart failure converts to ICD-9-CM 402.00 (mal hyp ht dis w/o hf), 402.10 (benign hyp ht dis w/o hf), and 402.90 (hyp hrt dis NOS w/o hf). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.