CPT® Code 99457 and 99458 provide monthly reimbursement for the time your clinical staff spends monitoring data and engaging with patients.
CPT® Code 99458 is an add-on code to 99457. You can bill 99458 twice per month for additional 20-minute increments of clinical time. As long as the requirements for 99457 have been met, you do not need an additional live, synchronous call to bill 99458. However, you cannot bill 99458 without 99457.