Don't be a jerk - pay up.
Collections agencies can make your life miserable if they choose to.

It's called fraud.  If all they do is sue you for the money, you are getting off really easy.

In most states it's a crime and you can be prosecuted criminally if you receive goods or services and then stop payment on the check to avoid paying for them.

Why the hell would anyone ever take a check if it were that easy.

If the doctor wants advice on how to throw your worthless ass in jail, I will be more than happy to assist however.

You used to be amusing, you are now just irritating. Crawl back into your hole, or learn how to be a better human being.

I would hope the rest of the community will feel as I do, and leave you to your own, limited devices.

You can place a Stop Payment on the Check, however, if you've signed an agreement in good faith, with the payee, relative to the Down Payment, they can utilize a collection agency to attempt to process the debt.  Usually 30-60 days out will start it.  

Unless you've signed an agreement, that the payee may automatically deduct funds from you account, i.e., EFT Debit, you should be fine.  If they attempt to process the EFT debit, then file a claim with your bank relative to the unauthorized transaction and "charge it back".  Check 21 allows for this.  

I'd encourage you to contact the organization, inform them that you have no plans to follow-through with the full tests, and plan to initiate or have initiated a stop payment.  

Best bet would be to come to terms on a reasonable settlement, and follow-through so that there are no derogatory items out their on your credit profile.  

wire fraud, for starters? Pay your bills!!!!!!

by writing the check, you are acknowledging the debt.  Failure to honor a check will cause you no end of grief.  Do not write checks you don't intend to honor.
If cost is an issue, find some free clinic or planned parenthood.  
skb

A check is a "promise to pay" and is upheld as such in court.  Either way, you'll end up paying so you might as well just suck it up and pay the bill.

Re: Paying Docker for STD test. and stoping payment.

To answer your first question, the answer is no.
However, some jurisdictions allow bad check writers to be sent to a lower court, such as a magistrate for a judgment to be rendered (after service is effected). Magistrates have the power to order restitution, and hold you in contempt for not paying.

I hold you in contempt for being a dishonest deadbeat, and the only other advice I will give you is to pay your bills, and stop writing checks with less then honorable intentions.

If you were unhappy you missed your time to leave without paying before having the test run.  That makes as much sense as refusing to pay a provider for a date after doing the deed because you were not completely satisfied.  By the way when you filled out your paper work you signed a document allowing the doctor to treat you and promising to pay (This is standard for all medical offices and required by law.) should you not have insurance or should your insurance not cover the performed procedure.  IF YOU CANCEL THE CHECK IT IS FRAUD.  I personally as a doctor would not only send you to collections but would followup with criminal charges as well.  Sending you to collections cost me money, and fact is you used my services.  Test cost money and have already been done, who do you think pays for that.  

Gee why does health care cost so much?
A:  maybe because  I have to eat $250 of test because some idiot doesn't feel he should have to pay for them.

She was a little over weight and hurt my back.  

I sure I would win in court and I would pay services perform if were Have was for a co-pay this time the other was for a co-pay next time. The X- rays were taken were fake I know this because I put a hole in wall and the room was not lead in the walls. I the Dockers did was telling me to put ICE on it. So I was piss but I stop the stop payment. It only a felony when you don’t have a valid reason to stop payment I try calling them for a week starting 3 hours after the last time I see her to settle and get back the co-pay for next time. I had this happen once with a card charge it back and won. I using checking accounts because I have no more credit my score is very low.