New Medicare guidelines effective January 1, 2021, require a Standard Written Order (SWO) for Durable Medical Equipment (DME) billing, replacing the Detailed Written Order (DWO). The SWO must include specific documentation such as the patient's information, equipment description, and the treating practitioner's details to prevent claim rejections and assure compliance with payer rules. Accurate SWO documentation optimizes revenue cycle management for DME suppliers and minimizes delays in reimbursement.