I'll let you know once I've been, I'm booked in for 7th March. According to the docs they sent me the $605 includes x-rays and blood tests but does not include any additional vaccinations you require.
I did mention that my doctor did a blood test for everything on their list, the receptionist said to bring a copy of the report but not all of these are required to be vaccinated against. She indicated that Measles, mumps and rubella (MMR) as well as DTPa-Diphtheria, tetanus, acellular pertussis (whooping cough) are the main ones they are looking at, she also asked if I'd ever had Chicken Pox (which I havent)... that said, this was the receptionist and not the doctor himself, so don't take it as word!
Yes they are underneath the Sofitel which is right above Central Station, handy if you're taking the train.