Quest Diagnostics reported strong financial results for Q3 2007, with revenues growing 11.6% to $1.8 billion and operating margins improving to 17.3%. While volumes declined 2.4% due to losing a contract with UnitedHealthcare, revenue per requisition increased 13.3% and margins returned to pre-contract levels within 9 months. Quest also provided full-year 2007 guidance, expecting revenues of $6.6-6.7 billion and operating margins of 16%, and is focused on driving growth through new tests, acquisitions, and expanding patient and physician services.