Teach-Back Is Essential Care Infrastructure: A Low-Cost Strategy for Safer, More Equitable Care.

OBJECTIVES: This Insights article argues that health systems should treat teach-back as equity infrastructure because patient understanding is a prerequisite for safe follow-through, medication use, and effective self-management.

STUDY DESIGN: Narrative policy and practice commentary grounded in published evidence on health literacy, disparities, and teach-back implementation.

DISCUSSION: Many equity strategies focus on access, navigation, and utilization, yet they often leave a hidden gap untouched: whether patients actually understood what they were told. Low health literacy is associated with poorer outcomes and can partially explain disparities. Teach-back offers a practical way to verify comprehension, correct misunderstandings, and make communication safer for all patients, especially during high-risk transitions such as discharge, medication changes, referrals, and informed consent. I propose the "last-mile equity gap" as the distance between a completed encounter and a patient's true understanding of what happens next.

CONCLUSIONS: Teach-back should be measured, operationalized, and funded as a core equity and population health practice rather than treated as optional bedside etiquette.