medicare guidelines for b12 injections CPT Code 96372: Billing Guide, Modifiers and Reimbursement 2026 B12 Injection CPT Code Guide

If B12 levels are low but still in range indicating a functional deficiency (this is a deficiency but blood tests appear in normal range) then second line testing of homocysteine and MMA can confirm B12 and/or folate deficiency

Nat Metab 5 , 735759 (2023)

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Elevated NNMT is linked to: Reduced NAD+ availability Slower mitochondrial function Increased fat storage efficiency Higher risk for insulin resistance By reducing NNMT activity, 5-Amino-1MQ allows the body to maintain higher NAD+ levels, which can support better mitochondrial performance, improved fat oxidation, and more balanced energy metabolism