Intramuscular injection delivers B12 directly into tissue, which is critical for patients whose digestive systems cannot absorb oral supplements effectively
CMS CY-2026 MPFS & AMA CPT CPT code 96372 is a drug administration code used to report a single subcutaneous (SC) or intramuscular (IM) injection of a therapeutic, prophylactic, or diagnostic agent
Mov Disord Clin Pract 6:96103 Rui Q, Ni H, Li D, Gao R, Chen G (2018) The role of LRRK2 in neurodegeneration of Parkinson disease
Consequently, people who follow vegetarian or vegan diets are at greater risk of insufficient intake, as are older adults, who are more likely to have reduced gastric acid production affecting B12 absorption
also notes need for medical supervision in coronary artery disease)
Evidence: What does the current research actually support, and how preliminary is it