In July 1998, AHERF filed for bankruptcy, and the resulting $1.3 billion protection filing was the nation's largest nonprofit health care failure to date. The subsequent collapse of AHERF and the break-up of its assets led to the creation of the West Penn Allegheny Health System. [[Category:Companies based in Pittsburgh]] [[Category:Healthcare in Pittsburgh]] [[Category:Hospital networks in the United States]] [[Category:1999 establishments in Pennsylvania]] [[Category:Medical and health organizations based in Pennsylvania]]