After discovering a recent negative account added to my credit file, I contacted the Debt Recovery Solutions company located in XXXX XXXX inquiring about the account. I was informed it was a physician bill from XXXX years ago. I challenged that I would owe a physician {$630.00} as I have always had insurance and asked for proof. After XXXX weeks, I called a XXXX time stating I did not receive the requested information. The lady was very rude, overtalking me and I had to ask her to let me finish my sentences. I informed her that I would be researching the validity of the account and asked what the discount would be for me to pay it, if it is found valid. I was informed that {$530.00} would be accepted. After contacting XXXX XXXX XXXX XXXX XXXX XXXX ( my insurance provider for the last XXXX years ), they stated the physician, XXXX XXXX, never filed a claim for rendered services. The fact that their office did not file a claim to my insurance company, within XXXX months of service as allowed, can not leave me liable for the fees charged. Furthermore, I never received a notice of collection prior to this appearing on my credit report.