In Calhoun, Georgia, a city of around 16,000 residents 70 miles outsideof Atlanta, Walmart is testing out a new health center. If successful, Walmart may expand its initiative across the United States, potentially upending the way millions of Americans receive medical care.

At “Walmart Health,” which has a separate entrance next door to a massive Walmart supercenter, patients can see doctors for routine checkups and ongoing treatment of chronic illnesses, such as diabetes and heart disease, even if they lack health insurance. They can also get lab work, x-rays, dental care, behavioral health counseling, eye and hearing exams, and access other services. The bill for an annual checkup for an adult is $30 without insurance, an eye exam is $45 and dental exams cost $25. Therapy sessions are $60.

Walmart, America’s largest retailer, opened the facility in January. It’s only one of two in the country. The first, in Dallas, Georgia, another exurb of Atlanta, opened in September.

The entrance to Walmart's health center in Calhoun, Georgia.