CommercialCoverageMedium impact
Home Prothrombin Time Monitoring
Blue Cross & Blue Shield of Mississippi·MS · Cardiology, Internal Medicine, Family Medicine·Medical Policy
We identified it
Jun 20, 2026
Summary
This policy confirms coverage for home prothrombin time monitoring (INR testing) for patients on chronic warfarin therapy with mechanical heart valves or chronic atrial fibrillation. Patients must complete 3 months of anticoagulation management before home monitoring is considered medically necessary.
Action Required
Verify billing system accepts CPT 93792 for patient/caregiver training for home INR monitoring and HCPCS E1399 for INR monitoring devices and test strips. Ensure claims include documentation showing patient has completed at least 3 months of anticoagulation management before approving home monitoring services. Update encounter forms to capture qualifying diagnoses (mechanical heart valves, chronic atrial fibrillation).