how long am i liable?

[coffeeme]

What is the name of your state (only U.S. law)? Washington

I was seen by a massage practitioner in 2006. I got a bill in July 2008. I had no idea there was any moneys left owing, and thought it odd to get it 1 1/2 years later. I checked with my insurance company, and they told me I was not obligated to pay, since it was > 1 year, but they also gave me the 10% that was still pending. I sent her a check for this amount. Then in 1/09, I get another letter saying she wants $240, that apparently I verbally agreed to (on top of what was billed to and paid for by insurance). I asked for something I had signed showing that I knew about this, but she says it was a verbal agreement between us. I don't think I should have to pay it, don't have recollection that I owed more money, and feel like it is quite late to be asking for it years later. How long do practitioners have to send you a bill for services performed? I know it's only $240, but it's the principle of the thing. Should I just pay it, or ignore it? Can she come after me?
Thanks!

[ecmst12]

Technically you owe the money until you pay it, but the statute of limitations for written contract debts in WA is 6 years - you are not near that yet.