Federal and state governments mandate some health care organizations to implement antibiotic stewardship programs (ASPs). Some early adopters developed model ASPs that have helped set industry standards; other benchmarks will likely be forged in subsequent regulation, legislation, and jurisprudence. This article considers how ASP designs can affect professional autonomy, especially of frontline antibiotic stewards who are usually physicians and pharmacists. This article also considers how ASP development and implementation might influence standards of care and malpractice liability.