Vitamin Deficiency Test lab tests in QuestDirect Lab Test Test Cost Nutrient Deficiency Test Panel for Calcium Channel Blocker Patients - Folate Blood Test $65.00 Homocysteine Test - Homocysteine Test $75.00 Vitamin B12 & Folate Test - Vitamin B12 deficiency blood test $82.00 Vitamin D Test - Vitamin D Blood Test $75.00 Vitamin B12 Test - Vitamin B12 Testing $49.00