HealthCare.gov has prepared state by state information sheets (see the Pennsylvania data) on the Affordable Care Act. The site is managed by the Dept of Health and Human Services. Here is an excerpt:
Creating new coverage options for individuals with pre-existing conditions As of April 2012, 5,355 previously uninsured residents of Pennsylvania who were locked out of the coverage system because of a pre-existing condition are now insured through a new Pre-Existing Condition Insurance Plan that was created under the new health reform law. To learn more about the plan available in Pennsylvania, check here.