42 CFR § 410.57
Pneumococcal vaccine and flu vaccine
June 11, 2020
(a) Medicare Part B pays for pneumococcal vaccine and its administration when reasonable and necessary for the prevention of disease, if the vaccine is ordered by a doctor of medicine or osteopathy.
(b) Medicare Part B pays for the influenza virus vaccine and its administration.
[63 FR 35066, June 26, 1998]