Is this acceptable?

I went to my primary care doctors office for a yearly physical. I was not a new patient and had no documented history of any depression/anxiety/mental illness. They brought me back to the room and gave me laminated paper with five mental health questions on it and dry erase marker and told me to fill it out.

Seven months later I get a bill in the mail for a “brief emotional behavioral assessment”. Granted the bill was only for $6 (it looks like my insurance paid $17 on it). But...

I feel like this is not a good way to do business. Maybe even unethical?

I go to the doctor for one thing and they have me fill out some completely unrelated form that I later get charged for?? They didn’t tell me that it was going to cost me to fill out the form and it was the type of form they just hand to everyone (hence the dry erase marker/laminated paper). So this makes me think they’re charging everyone and all their insurance companies for this. I find that unacceptable.

Am I overreacting?

*I’m currently disputing the bill (simply because I disagree with the way they did things - I know it’s only $6, but still...)