This chapter explains how healthcare organizations work with influencers to reach defined patient audiences while protecting clinical integrity and legal compliance. The chapter defines influencer types, outlines a vetting and contracting process, and highlights disclosure, accuracy, and privacy rules. A risk section covers misinformation, self-diagnosis, reputational harm, and governance controls. A measurement framework links influencer posts to traffic, inquiries, and booked visits through UTM links, landing pages, and CRM tracking. Readers finish with a practical playbook, from selecting the right partner to monitoring outcomes and enforcing standards.