In preparation for the 2025 UN High-level Meeting on NCDs and Mental Health (HLM4), the Global Coalition on Aging calls for a bold shift: global health priorities must include older adults, who bear a growing burden of noncommunicable diseases (NCDs) yet are often overlooked. GCOA’s Call to Action outlines critical strategies across prevention, innovation, and care systems to ensure healthy aging is central to the fight against NCDs, while also tackling ageism and structural gaps in healthcare. The Call to Action makes the case that achieving health and well-being for all—as promised in the Sustainable Development Goals—depends on recognizing and investing in older populations.