surcharge (n)
/ˈsərtʃɑrdʒ/

an extra amount of money that you must pay in addition to the usual price

eligibility (n)
/ˌɛlədʒəˈbɪlət̮i/

the state of having the necessary qualities or fulfilling the necessary conditions

health insurance (n)
/hɛlθ ɪnˈʃʊrəns/

a type of insurance that pays for your medical treatment when you are ill

minimum (adj)
/ˈmɪnəməm/

being the smallest amount or number allowed or possible

middleman (n)
/ˈmɪdlˌmæn/

a person or a company that buys goods from the company that makes them and sells them to someone else

provider (n)
/prəˈvaɪdər/ 

someone who provides something

downside (n)
/ˈdaʊnsaɪd/

the disadvantages or less positive aspects of something

appointment (n)
/əˈpɔɪntmənt/

a formal arrangement to meet or visit someone at a particular time and place

nurse practitioner (n)
/nərs prækˈtɪʃənər/

a nurse who is trained to do many of the tasks usually done by a doctor