2026 ICD-10-CM Diagnosis Code I27.1Kyphoscoliotic heart disease

ICD-10-CM Codes›I00–I99›I26-I28›I27

ICD-10-CM I27.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I27.1 is a billable ICD-10-CM diagnosis code for kyphoscoliotic heart disease. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 314 through 316. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Pulmonary heart disease.

Code Identity

ICD-10-CM Code
I27.1
Billable Status
Yes — Valid for Submission
Code Describes
Kyphoscoliotic heart disease
Short Description
Kyphoscoliotic heart disease
Same as the full description in the CMS dataset.
Parent Code
I27
Other pulmonary heart diseases

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI26-I28Pulmonary heart disease and diseases of pulmonary circulation
CategoryI27Other pulmonary heart diseases
This CodeI27.1Kyphoscoliotic heart disease

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Kyphoscoliotic heart disease
  • Right ventricular failure due to pulmonary disease

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.

    • Disease, diseased
      • heart (organic)
        • kyphoscoliotic
    • Hypertension, hypertensive(accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)
      • pulmonary
        • due to
          • kyphoscoliotic heart disease
    • Kyphoscoliosis, kyphoscoliotic(acquired)
      • heart (disease)

Clinical ClassificationClinical

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

CCSR CIR014
Pulmonary heart disease
Default principal diagnosis: inpatient Yes · outpatient Yes

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 I27.1 to ICD-9-CMHistory

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

ICD-9-CM
416.1 Kyphoscoliotic heart dis
Exact Match The mapping is direct, with no qualifiers.

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 I27.1Overview

Is I27.1 (Other pulmonary heart diseases) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report kyphoscoliotic heart disease on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does I27.1 group to?

When kyphoscoliotic heart disease is the principal diagnosis on an inpatient stay, it groups to MS-DRG 314, 315, 316, with relative weights from 0.6821 to 2.0852 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of I27.1?

Under the General Equivalence Mappings, kyphoscoliotic heart disease converts to ICD-9-CM 416.1 (kyphoscoliotic heart dis). The mapping is a direct match.

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.