## **Billing requirements** When billing HCPCS code J3420 (Vitamin B12 injection), healthcare professionals must document medical necessity in the patients medical record
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Functions as a for metabolic reaction required for synthesis of purines and pyrimidines: co-enzyme The reaction depends on methyl cobalamin as a co-factor and is also dependent on folate, in which the methyl group of methyltetrahydrofolate is transferred to homocysteine to form methionine and tetrahydrofolate
Nothing in this article constitutes a claim that any compounded product is clinically proven, has been evaluated in clinical trials, or produces the same results as any FDA-approved drug
Many users choose to continue therapy long-term at maintenance doses rather than discontinuing
They are used for patients with multiple deficiencies or specific needs