University of California San Francisco (UCSF) Stanford Health Care's 'A+' rating is placed on CreditWatch with negative implications due to substantial deterioration in financial performance at the recently merged health system. Management anticipates an operating loss of about $65 million for the fiscal year-ending Aug. 31, 1999, representing a significant decline from the operating loss of $12.3 million in fiscal 1998. In a further complication, the presidents of University of California and Stanford University (the parent members of UCSF Stanford Health Care) jointly announced today that they have appointed a team to reassess the organizational structure of the health system, in light of its current financial and operational difficulties. On March 9, 1998, Standard and Poor's assigned an 'A+' rating