A 3-arm, randomized trial will be conducted among 450 adult asthmatics ages 60 and older at primary care practices in East and Central Harlem and the South Bronx. All patients, regardless of assignment, will receive care from primary care providers (PCP) with access to the EMR-based asthma decision support. Patients in the ACC and CHW arms will be assessed for barriers to asthma control and will receive support specifically tailored to the identified barriers, including those arising from physical, mental, social/economic, or cognitive issues. Program participation will be 12 months, during which the ACCs and CHWs will also work with the patients' PCPs to optimize care. The study team will engage stakeholders (patients and caregivers, clinicians, community-based organizations, others) to develop and prepare study materials and protocols. In addition to studying patient outcomes, the process of implementing these models of care will be evaluated and documented.