Salter Harris I fracture

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I need help on whether I should charge out this fracture. My supervisor says I have to, but x-rays (3) say no fracture. Here is the timeline and any help will be appreciated.
5-3-15 patient goes to local ER were x-rays were taken and stated no fracture, dislocation or joint space abnormality, soft tissue appear normal. The ER gave patient a splint and sent home.
5-13-15 patient continues to have pain and see primary doctor who ordered x-ray which stated no acute fracture, subluxation or dislocation of the left hand or wrist. If patient has persistent pain consider MRI to evaluate for occult fracture. Primary doctor had patient continue splint and Tylenol 3.
5-19-15 patient comes to our orthopedic practice, doctor does not do an x-ray but documents a Salter Harris I fracture and puts patient in short arm cast.
6-2-15 patient returns and the doctor does an x-ray at our facility, the x-ray states the left wrist were negative for acute process fracture, dislocation.
I do not want to charge for fracture when the x-rays are negative. I feel there should be proof of fracture in case of an audit.
Help!!!

Salter Harris I fracture