Pathology Associates Services is now Celligent Diagnostics and provides comprehensive pathology services to medical practices, hospitals and pathologists throughout the nation. Since 1982, we have combined the strengths of our Board-certified Pathologists, laboratory scientists and support staff to provide excellent service to our referring physicians and patients. Celligent Diagnostics, formerly Pathology Associates Services, is the largest privately owned pathology laboratory in the Charlotte region, accredited by the College of American Pathologists.