I34.1 – Nonrheumatic mitral (valve) prolapse

ICD-10-CM 2027 diagnosis code · Other forms of heart disease

Billable code

ICD-10-CM code I34.1

Code: I34.1 (claims format: I341)
Description: Nonrheumatic mitral (valve) prolapse
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: I30-I5A Other forms of heart disease
Parent codes: I34

Notes for I34.1

Applicable to:

Floppy nonrheumatic mitral valve syndrome

Excludes1 (not coded here):

Marfan's syndrome (Q87.4-)

Notes inherited from parent codes

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

I34 – Nonrheumatic mitral valve disorders

Excludes1 (not coded here):

mitral valve disease (I05.9)
mitral valve failure (I05.8)
mitral valve stenosis (I05.0)
mitral valve disorder of unspecified cause with diseases of aortic and/or tricuspid valve(s) (I08.-)
mitral valve disorder of unspecified cause with mitral stenosis or obstruction (I05.0)
mitral valve disorder specified as congenital (Q23.2, Q23.9)
mitral valve disorder specified as rheumatic (I05.-)

Index terms for I34.1

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

Related codes in I34

Frequently asked questions

What is ICD-10 code I34.1?

I34.1 is the ICD-10-CM code for nonrheumatic mitral (valve) prolapse, in the block I30-I5A (Other forms of heart disease).

Is I34.1 a billable code?

Yes. I34.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does I34.1 belong to?

It belongs to category I34 – Nonrheumatic mitral valve disorders.

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.