National Health Investors, Inc. engages in the sale-leaseback, joint-venture, mortgage, and mezzanine financing of senior housing and medical investments. It operates through the Real Estate Investments and Senior Housing Operating Portfolio (SHOP) segments. The Real Estate Investments segment includes real estate investments and lease, mortgage, and other notes receivables in independent living facilities. The SHOP segment is involved in two ventures that own the operations of independent living facilities. The company was founded by W. Andrew Adams in 1991 and is headquartered in Murfreesboro, TN.