Mitral Annulus Calcification

Code I34.8, Other nonrheumatic mitral valve disorders, has been expanded and new codes created to capture nonrheumatic mitral valve disorders as follows:• I34.81, Nonrheumatic mitral (valve) annulus calcification  • I34.89, Other nonrheumatic mitral (valve) disorders Mitral annulus calcification (MAC) is a chronic degenerative condition of the fibrous base of the mitral valve. Some contributing factors for MAC include age, atherosclerosis, chronic kidney disease, and congenital metabolic disorders. MAC can also be due to increased mitral valve stress from conditions such as hypertension, aortic stenosis or hypertrophic cardiomyopathy. There is a higher incidence of this condition in...

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Note:  The following article synopsis was NOT provided by the AHA. It was created by Find-A-Code/innoviHealth.

Article Overview

This article covers a coding update in ICD-10-CM alongside a general medical overview of mitral annulus calcification. It is relevant to coders, clinical documentation staff, and cardiovascular specialists who need to understand how the topic is being categorized and why it matters in patient care and procedure planning. The content also reviews common associations, contributing factors, and the broader clinical significance of the condition.

Why This Topic Matters

Accurate categorization of mitral annulus calcification affects diagnosis reporting, risk recognition, and documentation quality in cardiovascular care. The article helps readers understand where this condition fits within a revised ICD-10-CM structure and why it can be clinically important.

What You Will Learn

  • How the article frames an ICD-10-CM update involving nonrheumatic mitral valve disorders
  • What mitral annulus calcification is in general clinical terms
  • Which patient factors and related conditions are associated with the topic
  • Why the condition may matter in cardiovascular evaluation and procedures

Who Should Read This

  • Medical coders
  • Coding auditors
  • Clinical documentation specialists
  • Cardiologists
  • Cardiovascular surgery staff
  • Revenue cycle professionals

Codes Discussed

  • ICD-10-CM: I34.8
  • ICD-10-CM: I34.81
  • ICD-10-CM: I34.89

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