What DAW code indicates that the medication must be dispensed exactly as written, with no substitutions allowed?

The DAW code that indicates a medication must be dispensed exactly as written, with no substitutions allowed, is DAW 1. This code signifies that the prescriber has specified that the brand-name drug should be used, and no generic equivalents or alternative formulations are acceptable. It reflects the prescriber's intention that the patient receives the specific product prescribed, often due to therapeutic reasons, past experiences with the patient, or the unique characteristics of the medication formulation. Using DAW 1 in billing ensures that the pharmacy is reimbursed based on this directive, and it helps to communicate the importance of adhering to the original prescription without any changes.