Final answer:
When ordering a tetanus shot for a patient with Medicare insurance, choose the Td (tetanus and diphtheria) vaccine. Td is recommended for adults as a tetanus booster every 10 years.
Step-by-step explanation:
When ordering a tetanus shot for a patient with Medicare insurance, the order you choose is Td (tetanus and diphtheria). Td is the recommended vaccine for adults as a tetanus booster every 10 years, according to the CDC. Tdap is a combination vaccine that includes Tetanus, Diphtheria, and Pertussis, and it is generally recommended for adolescents and adults who have not previously received a Tdap vaccine. However, Td is the most appropriate choice for ordering a tetanus shot for a patient with Medicare insurance.