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Modifier 59 and CPT 96372: When and How to Use It Modifier 59 signals a "Distinct Procedural Service." Use it with 96372 when a second or subsequent injection is given at the same visit, involving a different drug administered at a different anatomical site

Genetics, life circumstances, trauma history, sleep quality, hormonal status, physical health, and social support all play roles

In the meantime, you can try an OTC pain reliever for short-term relief

NHS Guidelines on Self-Administering B12 Injections The NHS supports patient self-administration of B12 injections where clinically appropriate and following adequate training