Don't know where you are, but I've used the Platte County
http://www.plattecountyhealthdept.co...4976&catID=518
The one in Parkville is walk in. Everything handled well. Told them I'd been expose to a bug and they had me registered and with a tech within 20 minutes. Gave me a card and told me to call the number in 2 days to talk with the nurse and get my results.
You can use insurance or cash. I think
I paid 35 bucks and got tested for chlamydia, HIV, gonorreah and syphilis. It's been a few months and may have been more. Paid with cash.
It's not anonymous. There is paperwork and I had to show a valid MO ID. I had no issues with it.
Don't dick around if you think you've been exposed. Get tested for peace of mind. And if you come up positive, they treat you.
No idea what that cost as I came up negative.
Good luck.