b12 by intramuscular injection cpt code for vitamin 96372 CPT Code: Injection of drug/substance under skin or into muscle CPT Code 96372 Billing Guide:
Description
Patients should maintain a medication log documenting the appearance of each vial or dose, including color intensity, clarity, and any observed changes

"Cyanocobalamin Drug Usage Statistics, United States, 2014 - 2023"

That includes certain antibiotics and powerful acid-suppressing drugs as well as the oral diabetes medication metformin

Handbook of Clinical Neurology

It does not include injections that are bundled as part of a larger service, such as those administered during an emergency room visit or inpatient hospital stay
