When a patient leaves the clinic after receiving instructions for a colonoscopy, surgery, or a new medication, the clinical encounter is often considered complete. In reality, the most important part may be about to begin. Healthcare increasingly depends on patients carrying out complex tasks on their own: changing their diet, taking medications at the right time, arranging transportation, recognizing warning signs, and knowing when to seek help. Success depends less on what

Executive Summary Healthcare organizations have widely adopted digital reminders, patient portals, and SMS notifications. Yet many communication-dependent outcomes remain stubbornly poor. Emerging evidence suggests the problem may not be whether communication is digital, but whether it is personalized to how individual patients understand and act on healthcare instructions. The Digital Health Assumption We Rarely Question Over the last decade, healthcare has invested heavily