ICD-10 Code I27.848 – Other Fontan-associated condition (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I27.848 – Other Fontan-associated condition
What it is
I27.848 identifies a Fontan-associated condition that does not fit a more specific diagnosis. Use it for complications or sequelae linked to a Fontan circulation when the record supports the association.
Clinical signs
Clinical features vary; refer to documentation. Records may note impaired Fontan physiology, exercise intolerance, edema, cyanosis, arrhythmia, or other Fontan-related complications.
When to use this code
Use this code when the provider documents a Fontan-associated condition and no more specific ICD-10-CM code applies. It is appropriate for follow-up or evaluation of a documented Fontan complication.
If the note names a specific diagnosis, code that condition instead. Check documentation for the exact relationship to the Fontan circulation and any associated manifestations.
Do not use for
Do not use it for general congenital heart disease without Fontan association. Also avoid it when a more specific diagnosis or complication code is documented.
Coding tip
Code the documented Fontan-associated condition precisely and add the specific manifestation when the record clearly supports it.