42 C.F.R. § 410.57 Pneumococcal vaccine and flu vaccine.
Title 42 - Public Health
(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]
Title 42: Public Health
PART 410—SUPPLEMENTARY MEDICAL INSURANCE (SMI) BENEFITS
Subpart B—Medical and Other Health Services
§ 410.57 Pneumococcal vaccine and flu vaccine.

