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I06.0 vs I08

I06.0 (Rheumatic aortic stenosis) compared with I08 (Multiple valve diseases), from the official CMS tabular data.

Summary

These codes can be reported together when both conditions are documented, because I06.0 lists I08 under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named and billing status.I06.0 is “Rheumatic aortic stenosis”; I08 is “Multiple valve diseases”. I08 is a non-billable header; I06.0 is billable.

Registry fact

Can these codes be reported together?

Yes, when both are documented.I06.0 lists I08 under Excludes2: “aortic valve disease with mitral and/or tricuspid valve involvement (I08.-)”. Excludes2 marks distinct conditions that may both be reported when both are documented.

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes1 relationship?

None.Neither entry carries an Excludes1 note that names the other code. I08 carries 2 Excludes1 notes covering other codes; the side-by-side table quotes them.

Official rule

Is there an Excludes2 relationship?

Yes.I06.0’s tabular entry: “aortic valve disease with mitral and/or tricuspid valve involvement (I08.-)”. The note covers I08.

Official ruleGuide: Excludes1 vs Excludes2

Is one more specific?

Not comparable.The codes sit in different categories; specificity is only comparable within one category.

Is one a parent or header code?

One is a header.I08 is a non-billable header, but I06.0 is not one of its subdivisions.

Registry fact

Are there sequencing instructions?

None.Neither entry carries a Code First or Use Additional Code note that names the other.

Official rule

Are there other coding relationships?

None found.No laterality, encounter-phase, Table of Neoplasms, Table of Drugs and Chemicals, or history-versus-active-disease relationship links these codes.

MedCoder-derived

Official rule: a tabular instructional note or a section of the ICD-10-CM Official Guidelines, quoted as published. Registry fact: the codes’ own published attributes (titles, billable status, position in the hierarchy, code set). MedCoder-derived: a reading MedCoder computes from those facts; it is not itself a rule. How to read the labels

Can these codes be reported together?

Informational

Excludes2 relationship

I06.0
Rheumatic aortic stenosis
↔
I08
Multiple valve diseases

What we found

Yes, when both are documented.I06.0 carries an Excludes2 note covering I08: “aortic valve disease with mitral and/or tricuspid valve involvement (I08.-)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

What to review

Report both only when the documentation supports both conditions; otherwise report the one documented.

Guide: Excludes1 vs Excludes2Check these on a claim

Why it matters

An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.

Source / rule

CMS ICD-10-CM tabular instructional notes

Official guidance behind these answers

  • Section I.A.12.b — Excludes2 · applies to: Excludes2

    A type 2 Excludes note represents “Not included here.” An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

    ICD-10-CM Official Guidelines FY2026

Quoted from the ICD-10-CM Official Guidelines for Coding and Reporting in effect for the release shown. The tabular notes above are the code-level instruction; these sections are the convention that says how such a note is applied. Source document (CMS PDF) · Release and checksum

Side by side

I06.0Rheumatic aortic stenosisI08Multiple valve diseases
Billing statusBillableNon-billable header

Report instead: I08.0, I08.1, I08.2, I08.3, I08.8

ClassificationI00-I99 — Diseases of the Circulatory System (I00-I99)I00-I99 — Diseases of the Circulatory System (I00-I99)
DefinitionRheumatic aortic stenosis is a billable ICD-10-CM diagnosis code (I06.0).Multiple valve diseases is a non-billable ICD-10-CM category code (I08).
Includes
Rheumatic aortic (valve) obstruction
multiple valve diseases specified as rheumatic or unspecified
Excludes1—
endocarditis, valve unspecified (I38)
rheumatic valve disease NOS (I09.1)
Excludes2
aortic valve disease not specified as rheumatic (I35.-)
aortic valve disease with mitral and/or tricuspid valve involvement (I08.-)
multiple valve disease specified as nonrheumatic (I34.-, I35.-, I36.-, I37.-, I38.-, Q22.-, Q23.-, Q24.8-)

Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on.

Edit this comparisonCheck a whole claim

Derived from the official CMS ICD-10-CM tabular data (FY2027). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources