An active license refers to a healthcare professional or supplier who is authorized to provide healthcare services or sell medical supplies directly to patients. An active certification, on the other hand, refers to a healthcare professional or supplier who is authorized to order, certify, or provide certain items or services for Medicare beneficiaries. For example, a durable medical equipment supplier may have an active certification to order and certify power wheelchairs, but they may also have an active license to sell and service other types of medical equipment. It is important to understand the difference between the two, as they serve different purposes in the Medicare enrollment process.