Medicare AdvantageBilling CodesHigh impact
MA07.026s, Ambulatory Electrocardiography (AECG) Monitoring and Mobile Cardiac Outpatient Telemetry (MCOT) Monitoring
Independence Blue Cross·Cardiology, Internal Medicine·Medical Policy
Effective date
Oct 1, 2026
We identified it
Oct 2, 2026
Summary
Independence Blue Cross updated ICD-10 diagnosis codes for Medicare Advantage AECG/MCOT monitoring policy effective 10/01/2026. Three broad cardiomyopathy and arrhythmia codes (I42.0, I42.8, I49.8) were terminated and replaced with nine more specific codes that provide granular differentiation (e.g., familial-genetic dilated cardiomyopathy, Brugada syndrome, CPVT). Billing teams must update systems to use only the new codes to avoid claim denials.
Action Required
By October 1, 2026: Billing team must immediately update all systems, claim software, and encounter templates to discontinue use of ICD-10 codes I42.0, I42.8, and I49.8 for Independence Blue Cross Medicare Advantage plans. Replace with new codes: I42.00, I42.01, I42.09 (dilated cardiomyopathy variants), I42.81, I42.89 (other cardiomyopathies), I47.22 (CPVT), I49.81 (Brugada), I49.82 (bigeminy), I49.89 (other arrhythmias). Providers must update their diagnosis selection lists and documentation templates to reference only the new codes. Audit all claims submitted with terminated codes for this plan and resubmit with corrected codes. Failure to implement will result in claim denials on AECG/MCOT monitoring services for cardiomyopathy and arrhythmia diagnoses under MA plans.