Billable / Specific Code
ICD-10-CM I27.849 is the diagnosis code for Fontan related circulation, unspecified. This code falls under the section "Pulmonary heart disease and diseases of pulmonary circulation" within Chapter 9 — Diseases of the circulatory system (I00-I99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where I27.849 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, I27.849 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
I27.849 is the ICD-10-CM diagnosis code for "Fontan related circulation, unspecified". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of I27.849 is I27.84 ("Fontan related circulation"). I27.849 provides a more specific classification within this category.
I27.849 is located in Section I26-I28 — "Pulmonary heart disease and diseases of pulmonary circulation" within Chapter 9 of the ICD-10-CM Tabular List.
Use I27.849 when the patients documented diagnosis matches "Fontan related circulation, unspecified" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Fontan related circulation, unspecified is I27.849.
Yes, I27.849 can be used as a primary diagnosis code since it is billable and specific.
I27.849 is in Chapter 9 of the ICD-10-CM Tabular List.
Yes, I27.849 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.