SIX years ago, Jerry Garner, 45, a real estate agent in Gowen, Mich., underwent a kidney transplant. He recovered nicely, and thanks to diligent adherence to his drug regimen and frequent checkups, he has been healthy ever since — “a miracle,” said his wife, Stephanie.

But last year, the Garners were starting to believe that their good fortune had run out.

Mr. Garner’s insurer asked that he fill out a survey, but somehow this piece of mail slipped through the cracks at the Garner household. As a result, he lost his health insurance. (Ms. Garner, 44, and three of the children — their oldest child is grown — were covered under a different policy.) But because of his pre-existing condition, Mr. Garner proved impossible to insure.

Transplant recipients must take expensive immunosuppressant medications. Without them, the new kidney will not survive. The couple paid Mr. Garner’s $2,000 monthly drug bill out of pocket and prayed nothing went wrong. Some months they had to choose between the medication and the mortgage.

Finally, after weeks of searching the Internet, making phone calls and praying, Ms. Garner saw a television ad for Michigan’s new pre-existing condition insurance plan. P.C.I.P.’s, as they are known, are state and federal programs for people previously deemed uninsurable because of pre-existing conditions. They offer a bridge to 2014, when the new health insurance exchanges, which must accept all comers, are to open.