What would be the CPT codes used for my visit so that I can estimate?

First of all, I am currently on no insurance plan (I’m a 21 year old college student).

Yesterday, I went to the ER under the idea that I probably overdosed on my antidepressants (Wellbutrin). It wasn’t like purposeful – I was just dumb and freaked out when I realized it – poison control said go to ER asap, so I did.

I was wondering what CPT code might be used for this? I wasn’t sure how severe it would be – they said it could be life threatening when I got there.

The doctors said I should stay overnight to be monitored in case I had seizures, and everything turned out fine – I felt a bit hazy after the overdose, but overnight, I felt fine. What CPT code might be used for this? They did a vitals check every so often, but I was okay and I didn’t need any meds/procedures/etc.

I was admitted 1pm yesterday and discharged at 11am today. I just would like to know what CPT codes might’ve been used so that I can estimate – I’m really worried about the bill, and I won’t be able to get into contact with billing until Monday. Thank you!