First of all it goes on your tax return for the year you take it out. So if you withdraw it by Dec 31 it goes on 2017. After Jan 1 it goes on next year's 2018 return We file in 2019.
You will pay tax on a Traditional IRA distribution. It will add to your other income and may push you into a higher tax bracket. If you are under 59 1/2 there is also a 10% Early Withdrawal Penalty unless you have an exception. I believe medical is an exception. See IRS publication 590B for IRA Distributions
<a rel="nofollow" target="_blank" href="
https://www.irs.gov/pub/irs-pdf/p590b.pdf">https://www.irs.gov/pub/irs-pdf/p590b.pdf</a>
