Vitamin Deficiency Test lab tests in LabsMD Lab Test Test Cost Vitamin D, 1,25-Dihydroxy, LC/MS/MS - vitamin d test cost $90.49 Vitamin B12 - Vitamin B12 Testing $55.49 Methylmalonic Acid - Methylmalonic Acid Test (Blood) $55.99 Vitamin D, 25-Hydroxy LC/MS/MS - Vitamin D Blood Test $69.99 Vitamin B12 and Folates - Vitamin B12 deficiency blood test $65.99 Folate, RBC $53.99 Homocysteine, Cardiovascular - Homocysteine Test $67.99 Folate (Folic Acid) - Folate Blood Test $40.49 Vitamin A (Retinol) - Vitamin A blood test $47.99