Saga Diagnostics’ Pathlight molecular residual disease (MRD) test has received positive Medicare coverage through the MolDx program for surveillance monitoring of breast cancer recurrence across all subtypes in stage II-III patients. The blood-based digital PCR assay detects patient-specific tumor DNA alterations with high sensitivity and a lead time of over a year compared to standard methods. This coverage opens broader access to ultrasensitive recurrence monitoring, potentially enabling earlier intervention and personalized patient management.