I34.1

ICD-10Billable

Nonrheumatic mitral (valve) prolapse

Official ICD-10-CM descriptor (FY2026)

Nonrheumatic mitral (valve) prolapse

I34.1 is valid for submission on a claim — CMS flags it as a billable, specific code.

Inclusion terms

Floppy nonrheumatic mitral valve syndrome

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

Marfan's syndrome (Q87.4-)

Related codes in I34

Where this code sits

Chapter: 9. Diseases of the circulatory system (I00-I99)
Block: Other forms of heart disease (I30-I5A)
Parent code: I34

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.