Harris Chiropractor Unaware of excessive charges Jenks, Oklahoma

My daughter & I were patients of Harris Chiropractor. I did not receive a bill from them until I already had 3 visits and my daughter had already had 5 visits. My co-pay was $50 every time which I paid after each visit. I was billed for extra manipulation charges and $20 for every 10 minutes of electrical stimulation after the back manipulations. Since we already had 8 visits between the two of us the bill was $160 alone in electrical stimulation charges. I really feel these charges were unfair. We were told that we had to have 2 visits per week for each of us for the therapy to work. I think that they just wanted us to rack up charges before we realized what was going on. Honestly, per my insurance company which is Blue Cross Blue Shield, Harris knew by my 2nd visit that the electrical stimulation wasn't being covered. I should have been given the option of continuing with the 10 minutes of electrical stimulation or not based on the fact that it would be an out of pocket cost. When I called Harris to discuss these charges, Hillary made me feel that my insurance company was just being cheap.

 The Chiropractor I see now can tell me within the time of my visit whether or not my insurance company will cover the treatment and I am given the option to continue if its going to be an out of pocket charge. Harris told me they were too busy to take the time to call insurance companies for preapproval and that it's really my job to do that. How could I call for preapproval? I don't know the codes for their billing? This place is a SCAM! I refuse to pay for their bogus charges.