Physicians prescribe the CardioNet MCOT for up to 30 days, during which patients wear the device 24/7 for comprehensive monitoring and diagnosis.

More than 300,000 patients nationwide have used MCOT, and multiple companies are developing wireless heart-rate monitoring devices.

On Sunday, CardioNet -- a maker of technology to diagnose and monitor heart rhythm disorders -- said Highmark Medicare Services was adjusting its reimbursement rate for MCOT services to $754 per ...