CVS Health ($CVS@US) is close to reaching its agreement to acquire Oak Street Health ($OSH@US) for $10.5 billion with a share price of $39, a deal that would expand the healthcare giant’s network of primary-care doctors and senior-focused clinics. Oak Street focuses on the care of patients enrolled in Medicare, and CVS CEO Karen Lynch has indicated that primary care and home-based care are areas of growth for the company. CVS’s acquisition of Oak Street would advance the company’s mission to expand its business beyond retail pharmacy.