National Health Investors Inc is a self-managed REIT that owns, leases, operates, and finances the development of senior housing communities and medical facilities. It operates through two segments: Real Estate Investments and Senior Housing Operating Portfolio (SHOP). The Real Estate Investments segment, which generates the majority of revenue, includes real estate leases, mortgages, and other notes receivable related to independent living facilities, assisted living facilities, entrance fee communities, senior living campuses, skilled nursing facilities, and a hospital. The SHOP segment consists of ventures that own and operate independent living facilities. The company's revenues are derived from rental income, interest and other income, and resident fees and services.