Medicare officials initially indicated there was no reason for concern.
After considering the comments, Medicare officials will issue final rules with the force of law.
But Medicare officials said the benefit would be easy to use.
Medicare officials said the new program would save $80 million next year and more than $1 billion over five years.
Medicare officials have never had so many changes to make at once.
Medicare officials say they are merely doing their jobs better.
And Medicare officials provide the public with "little information" on the performance of either hospitals or the commission, she said.
Medicare officials had said the data would be publicly available before May 15.
Medicare officials say the program is paying for more than a million prescriptions a day.
Medicare officials had said the woman should pay the cost.