The Washington My Health My Data Act (MHMDA) may be the most operationally challenging privacy law in the country. In this guest article, Blank Rome attorneys Phil Yannella, Sharon Klein, Jennifer Daniels and Alex Nisenbaum explore the practical hurdles of complying with the MHMDA, focusing on differences between the Act and other state privacy laws, and provide an explanatory checklist to help companies implement their compliance programs. See our two-part series on Washington’s aggressive health privacy law of 2023: “Right to Sue and Onerous Consent Obligations” (May 3, 2023), and “Ten Compliance Priorities” (May 10, 2023).