Possible trigger for content about being suicidal

A few weeks ago I had a session with my therapist and felt extremely suicidal. I was the last client of the day and he told me I had to go to the hospital. He said he wanted to be sure I brought myself there so he followed me in his car. He ended up staying with me at the hospital for a while, and didn't leave until about an hour and a half past the time when our appointment should have ended normally. I really appreciated him staying, but felt bad because I was wasting his time, so I told him a couple times he didn't have to stay if he didn't want to.

The company he works for has my card on file so I get charged automatically after each session. I got an email saying I was charged my normal coinsurance rate for that session, but then I just got another email (a few weeks later) saying I was charged an additional amount for that same session for "crisis" services.

Obviously I appreciate my therapist and want him to get paid for his time, but I feel a little blindsided by the extra charge. It's not an outrageous amount or anything and I'm not going to try to get my money back, but is it bad of me to feel upset about the charge? If I'd known I'd be charged more I would have gotten myself to the hospital sooner and just told him to not stay. Should I bring it up to my therapist or the receptionist or just forget about it?
Thanks for any opinions!