HCPCS code J3420 is used to report the injection of vitamin B-12 cyanocobalamin, up to 1000 mcg, administered by a non-oral route such as intramuscular or subcutaneous injection

5 mg vial calculation table BAC water added 1 mL Concentration 5,000 mcg/mL 300 mcg 6 units 500 mcg 10 units BAC water added 2 mL Concentration 2,500 mcg/mL 300 mcg 12 units 500 mcg 20 units BAC water added 3 mL Concentration 1,667 mcg/mL 300 mcg 18 units 500 mcg 30 units Syringe units = target amount concentration per unit AOD-9604 Calculations for Other Vial Sizes 10 mg vial calculations BAC water added 1 mL 300 mcg 3 units 500 mcg 5 units BAC water added 2 mL 300 mcg 6 units 500 mcg 10 units BAC water added 3 mL 300 mcg 9 units 500 mcg 15 units 2 mg vial calculations BAC water added 1 mL 300 mcg 15 units 500 mcg 25 units BAC water added 2 mL 300 mcg 30 units 500 mcg 50 units BAC water added 3 mL 300 mcg 45 units 500 mcg 75 units Do not reuse the syringe-unit amount from a 5 mg vial when the vial size or water amount is different
use in pregnancy only if the potential benefit justifies the potential risk to the fetus
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