In San Jose, Calif., on June 6, President Obama encouraged people to sign up for insurance in the nation's largest health insurance market. Stephen Lam/Getty Images hide caption

itoggle caption Stephen Lam/Getty Images

President Obama encourages people to sign up for health insurance exchanges in San Jose, Calif., on June 6. Stephen Lam/Getty Images hide caption

itoggle caption Stephen Lam/Getty Images

Peter Lee, executive director of Covered California, unveiled the plans and prices that will be offered by private insurers at a media briefing in Sacramento on Thursday. Rich Pedroncelli/AP hide caption

itoggle caption Rich Pedroncelli/AP

Shops and other small firms may be open, but health insurance exchanges will take a little longer before they're ready to offer a full range of health plans for small business customers. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Colonoscopy copay? Zero. iStockphoto.com hide caption

itoggle caption iStockphoto.com

The heath exchange Mississippi Insurance Commissioner Mike Chaney had in mind got turned down by the federal government. Rogelio V. Solis/AP hide caption

itoggle caption Rogelio V. Solis/AP

Gov. Bill Haslam speaks to reporters after announcing in Nashville, Tenn., on Monday that that he had decided against creating a state-run health insurance exchange. The Republican governor said he will leave it to the federal government to run the marketplace. Erik Schelzig/ASSOCIATED PRESS hide caption

itoggle caption Erik Schelzig/ASSOCIATED PRESS

Nebraska Gov. Dave Heineman announced Thursday that his state will choose the federal health insurance exchange program. Nati Harnik/AP hide caption

itoggle caption Nati Harnik/AP

Problems with a computer system could delay work on health insurance exchanges. iStockphoto.com hide caption

itoggle caption iStockphoto.com