Walgreen Co., the biggest U.S. drugstore chain, agreed to join with the largest federation of health insurers to promote the Affordable Care Act, lending a hand as the Obama administration strains to win over the public.

The Blue Cross Blue Shield Association, which has health plans in 38 states including 14 owned by WellPoint Inc., said today it will set up an educational website with Walgreen and distribute information in the retailer’s 8,000 stores. The campaign is aimed at encouraging people without insurance to use the government exchanges to shop for subsidized health plans.

The announcement may provide a lift two weeks after the National Football League threw water on the idea of becoming a partner with the Obama administration, which has struggled to sell the benefits of the health law amid roadblocks by Republican opponents. The Walgreen-Blue Cross effort would be the largest by private industry to promote the Affordable Care Act.

“There’s a lot of confusion, a lot of questions, and it’ll take a tremendous collaborative effort to make sure people have the information they need to make informed choices,” Brad Fluegel, chief strategy officer for Deerfield, Illinois-based Walgreen, said in a statement.

The companies didn’t disclose financial terms of the partnership. Chicago-based Blue Cross includes plans that cover about 100 million people in the U.S.

Ad Campaign

While the core parts of the 2010 health law take effect next year, about 4 in 10 people polled by the nonprofit Kaiser Family Foundation in April said they weren’t even sure the law was still on the books.

The Obama administration has been criticized by opponents and supporters for not doing enough to promote the law. The online exchanges are supposed to be ready Oct. 1 for people to start signing up for insurance that would start Jan. 1.

U.S. officials opened a hotline for questions about the law last month and activated a website that outlines its provisions. The administration also has hired the advertising and public relations firm Weber Shandwick to design publicity campaigns for the law, which will begin closer to October, Health and Human Services Secretary Kathleen Sebelius has said.

The government has announced programs totaling about $212 million to promote the law, including grants to federally funded health clinics to hire people who will help patients sign up for insurance.

NFL Discussions

The administration has complained that efforts to do more have been stymied by congressional Republicans, none of whom voted for the health law. Republicans have refused to approve additional funding to implement the law and they opened an investigation into Sebelius’s urging of corporate support for a nonprofit, Enroll America, that has been handling some promotion.

Sebelius stumbled again last month when she told reporters she had discussed a partnership with the National Football League to promote the law. Senator Mitch McConnell of Kentucky, who leads Republicans in the Senate, wrote a letter to the NFL on June 28 demanding to know more about the talks. A spokesman for the league, Greg Aiello, then denied there had been any “substantive” discussions and said there were no plans to help promote the law.

The new health exchanges will sell insurance online and over the phone from companies such as Indianapolis-based WellPoint. People who lack coverage through their jobs will be eligible for tax credits to help pay monthly premiums if they make less than four times the poverty level -- about $94,000 for a family of four.

The plans begin Jan. 1, when the law requires most Americans to carry insurance. About 7 million people are expected to enroll in exchange plans next year, rising to 25 million by 2018, according to the Congressional Budget Office.

The law also encourages states to expand their Medicaid programs for the poor to cover people earning close to poverty- level wages. About 24 states have refused so far, Sebelius said on June 24.