The Microvolt T-Wave Alternans™ (MTWA) test from Cambridge Heart is reimbursed by Medicare and several private insurers. The CPT code for MTWA testing is 93025.

Cambridge Heart’s test is the only Medicare-reimbursable MTWA test on the market.

In July 2010, the National Correct Coding Initiative (NCCI) changed the edits associated with MTWA testing, allowing MTWA to be performed on the same day as several stress procedures.