2026 ICD-10-CM Diagnosis Code I27.840Fontan-associated liver disease [FALD]

ICD-10-CM Codes›I00–I99›I26-I28›I27

ICD-10-CM I27.840
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I27.840 is a billable ICD-10-CM diagnosis code for fontan-associated liver disease [FALD]. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 441 through 443.

Code Identity

ICD-10-CM Code
I27.840
Billable Status
Yes — Valid for Submission
Code Describes
Fontan-associated liver disease [FALD]
Short Description
Fontan-associated liver disease [FALD]
Same as the full description in the CMS dataset.
Parent Code
I27.84
Fontan related circulation

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI26-I28Pulmonary heart disease and diseases of pulmonary circulation
CategoryI27Other pulmonary heart diseases
This CodeI27.840Fontan-associated liver disease [FALD]

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.

    • Circulation
      • Fontan related
        • with
          • Fontan-associated liver disease [FALD]
    • Disease, diseased
      • liver (chronic) (organic)
        • Fontan-associated (FALD)

Code History & ChangesHistory

New Code I27.840 was added to the ICD-10-CM code set for FY 2026, effective October 1, 2025.

Replacement I27.840 replaces the following previously assigned code(s):

  • I27.89 - Other specified pulmonary heart diseases
FY 2026AddedAdded to the ICD-10-CM code setEffective October 1, 2025.
FY 2026CurrentRevised in the current code setEffective October 1, 2025 through September 30, 2026.

Questions About I27.840Overview

Is I27.840 (Fontan related circulation) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report fontan-associated liver disease [FALD] on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does I27.840 group to?

When fontan-associated liver disease [FALD] is the principal diagnosis on an inpatient stay, it groups to MS-DRG 441, 442, 443, with relative weights from 0.6997 to 1.7947 depending on complications. Higher weights mean higher Medicare reimbursement.