Cat Urinating on Bed

Question
Thank you very much.  My roommate's door has stayed closed since it happened, and she hasn't peed anywhere else since.  I would like to ask one more quick question.  She has also decided recently (about a month or two ago) to stop covering her poo in the litter box.  She kicks the litter around but doesn't cover anything.  She didn't used to do this.  I haven't changed anything about the litter or the box.  Any idea about why she might be doing this?  Thank you again.
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Followup To

Question -
My cat is almost one year old, litter box trained and everything.  Last night she decided to pee on my roommate's bed.  Then she did it again this afternoon.  She has never gone to the bathroom anywhere except in her litter box since I've had her.  Is there any reason she would just start doing this?  Her litter box is kept clean too.  Thank you.

Answer -
Laura, most likely this is due to a urinary tract infection or some inflammation of the bladder.  About 9 out of 10 cases of failure to use the litter box have a physical cause.  So I would get her to the vet quickly.  I have a cat that has permanent kidney failure because a urinary tract infection went untreated too long.

If she's found to be healthy, then you'll have to consider the idea it's behavioral.  Usually, when a cat pees on the belongings of one particular person (bed, laundry, etc.), it's due to separation anxiety.  The cat feels nervous when that person isn't around.  I would keep your roommate's bedroom door closed.

Also, it's best to wash the accident area with an enzymatic cleaner to make sure the stain is removed.  Nature's Miracle is one that's available at pet stores.

Answer
Sorry for the delay in my answer!  I didn't know I had a question waiting.

I find when cats stop covering their waste, it's usually because there's something making standing in the box undesirable.  Maybe it hasn't been dumped, sanitized and refilled recently enough.  Maybe there's already waste in it that they're trying to avoid.  Maybe they've developed a sensitivity to the scent of the litter.  What I find best with cats like this, personally, is to dump the entire contents of the box every day or two.  I use only about an inch of litter, and just dump it and refill it each day.  Might be something to try.

The only other issue is if she's declawed, the litter may be hurting her feet, and it might be wise to switch to a softer litter, like ground cedar or regular old sand (sold for childrens' sandboxes).