Tetanus is only covered when related to an injury
Tetanus and Tetanus/Diphtheria Toxoids (90702, 90703, 90714, and 90718)
When filing claims for 90702, 90703, 90714, or 90718, the primary diagnosis should be one of the ICD-9 "V" codes indicating the need for prophylactic vaccination against bacterial diseases or combinations of diseases (V03.7 Tetanus toxoid alone or V06.5 tetanus-diphtheria)
plus an injury related ICD-9 code as the
secondary diagnosis. Tetanus or tetanus-diphtheria (Td) toxoids adsorbed are only covered when directly related to the treatment of an injury/wound. For further instructions, please visit the Centers for Medicare Medicaid Services website to view the Internet Only Manuals (IOM) –
Medicare Benefit Policy Manual (Pub 100-2, Chapter 15, Section 50.4.4.2 - Immunizations
http://www.cms.gov/manuals/Downloads/bp102c15.pdf