Medicare and B12 injections: Are They Covered? What Does Medicare Actually Cover? Haven Shield Insurance DYK your Medicare ABCs? Part A is for hospitalization insurance, Part B is for medical insurance, and Part A and Part B together are often called Original Medicare. Medicare Part C is Medicare Parts Explained: Part A, Part B, Part C, and Part D Does Your Medicare Plan Cover B12 Shots? Which vaccines does Medicare cover? UnitedHealthcare