I05.9 – Rheumatic mitral valve disease, unspecified

ICD-10-CM 2027 diagnosis code · Chronic rheumatic heart diseases

Billable code

ICD-10-CM code I05.9

Code: I05.9 (claims format: I059)
Description: Rheumatic mitral valve disease, unspecified
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 9. Diseases of the circulatory system (I00-I99)
Block: I05-I09 Chronic rheumatic heart diseases
Parent codes: I05

Notes for I05.9

Applicable to:

Rheumatic mitral (valve) disorder (chronic) NOS

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

I05 – Rheumatic mitral valve diseases

Includes:

conditions classifiable to both I05.0 and I05.2-I05.9, whether specified as rheumatic or not

Excludes1 (not coded here):

mitral valve disease specified as nonrheumatic (I34.-)
mitral valve disease with aortic and/or tricuspid valve involvement (I08.-)

Index terms for I05.9

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in I05

I05.0 – Rheumatic mitral stenosisBillable
I05.1 – Rheumatic mitral insufficiencyBillable
I05.2 – Rheumatic mitral stenosis with insufficiencyBillable
I05.8 – Other rheumatic mitral valve diseasesBillable

Frequently asked questions

What is ICD-10 code I05.9?

I05.9 is the ICD-10-CM code for rheumatic mitral valve disease, unspecified, in the block I05-I09 (Chronic rheumatic heart diseases).

Is I05.9 a billable code?

Yes. I05.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does I05.9 belong to?

It belongs to category I05 – Rheumatic mitral valve diseases.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.