2026 ICD-10-CM Diagnosis Code I27.848Other Fontan-associated condition
I27.848 is a billable ICD-10-CM diagnosis code for other Fontan-associated condition. 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.
Code Identity
Code Classification
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Use Additional Code
- code to specify the Fontan associated condition
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Condition - See Also: Disease;
- Fontan-associated, specified NEC - I27.848
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Circulation
- Fontan related
- with
- Fontan-associated condition, specified NEC
- Condition
- Fontan-associated, specified NEC
Code History & ChangesHistory
New Code I27.848 was added to the ICD-10-CM code set for FY 2026, effective October 1, 2025.
Replacement I27.848 replaces the following previously assigned code(s):
- I27.89 - Other specified pulmonary heart diseases
Questions About I27.848Overview
Is I27.848 (Fontan related circulation) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other Fontan-associated condition on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does I27.848 group to?
When other Fontan-associated condition 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.
