AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2022 Issue 4; New/Revised ICD-10-CM Codes

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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