NEWTON, Mass.--(BUSINESS WIRE)--Today McKesson Health Solutions announced that Health Plan of San Joaquin has licensed McKesson Contract Manager™ to help serve over 300,000 Medicaid members in California’s Central Valley. Health Plan of San Joaquin will use the flexible contracting solution to help automate its contracting process to engage providers differently by providing higher service levels, improving collaboration and boosting provider satisfaction. In a rapidly changing, highly competit