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U.S. ICD-10-CM · FY 2027

I27.84 ICD-10-CM Code: Fontan related circulation

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

I27.84

Fontan related circulation

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where I27.84 sits

  1. 1

    Chapter 9

    Diseases of the circulatory system (I00-I99)

  2. 2

    Section

    Pulmonary heart disease and diseases of pulmonary circulation (I26-I28)

  3. 3

    Category I27

    Other pulmonary heart diseases

  4. 4

    Subcategory I27.8

    Other specified pulmonary heart diseases

  5. 5

    Code I27.84

    Fontan related circulation

More specific choices

Codes under I27.84

I27.84 is a non-billable category. Choose the child code that best matches the documented diagnosis.

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for I27.84.

Code first

No “code first” instruction is listed for I27.84.

Use additional code

No “use additional code” instruction is listed for I27.84.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for I27.84.

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for I27.84.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code I27.84 mean?

I27.84 is the FY 2027 U.S. ICD-10-CM code for “Fontan related circulation.”

Is I27.84 a billable or specific ICD-10-CM code?

No. I27.84 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is I27.84 located in ICD-10-CM?

I27.84 is listed in Chapter 9, Diseases of the circulatory system (I00-I99), within Pulmonary heart disease and diseases of pulmonary circulation (I26-I28) (I26–I28), under category I27, Other pulmonary heart diseases and subcategory I27.8, Other specified pulmonary heart diseases.

What coding notes are listed for I27.84?

No inclusion terms are listed for I27.84 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.

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