Sharp reduction in external citations (partial rebound after April)
Beginning in March 2026, ChatGPT sharply reduced how often it cited external sources, both the share of responses showing citations and the average number of citations per response dropped substantially. After a precipitous decline through March-April 2026, citation rates rebounded but settled at lower baseline levels across all five major markets. Citation concentration also increased: the top 15 domains now capture ~68% of consolidated ChatGPT citation share.
For healthcare and behavioral health sites: if your ChatGPT citation traffic dropped in Q2 2026, this was the driver, not a change on your site. The playbook for recovery: content structure (clear H2/H3 hierarchy, direct question-answer patterns), stronger domain authority signals (build referring domains, sites with 32,000+ referring domains are 3.5x more likely to be cited than sites under 200), and content freshness. Traditional SEO signals still matter; ChatGPT reads authority signals similarly to Google.
