<human>: Can you provide a brief rundown of the text in within 3 sentences?

I made a terrible decision to go to the emergency room several months ago because of a severe cough.  I had medical insurance and I figured that the visit would be mostly covered.  The insurance ended up covering only about 50% of the visit, leaving me with a bill for over $1200.  
After some attempts to discuss this with the hospital's general customer support, I got to speak with their business department and told them I would like to dispute the charge.  They told me to expect a 'dispute form' within 30 days.  What I received was a letter from a collection agency informing me that they would now be the ones trying to collect on the dept.  
What I wanted to dispute was the amount charged.  The hospital visit ended up with me talking to a nurse, waiting for a doctor for over an hour while sitting in the hospital hallway on a bed with a number (like that was a room) and speaking to a doctor who told me that I don't have pneumonia and should go home and drink lots of fluids.  
After getting this bill, I asked for an itemized statement, which ended up being one unit of emergency service level 3.  While I am capable of paying this, I would like to at least attempt to dispute it.  Once it ended up in collections though, is there anyone I could officially dispute this charge with?  I can't imagine the agency would care.  I wouldn't want this to go to court, but I do want someone to at least officially acknowledge that charging this much for the amount of services rendered is valid and acceptable.
<bot>: Once a medical bill ends up in collections is there a way to dispute it?  What is the best course of action to do so?