I've seen this more then once. Not just with WC. It's happened on my files several times with Drs. I've seen. It's hard for us because then we know the truth but can't prove what they said to us.
When my husband went to a Dr. for his back for WC. The Dr. actually said he didn't see Bill. Strange that you see a Dr. and he has no file and says he didn't see you.
I would do as others said and write what he told you down for your lawyer so your side can be presented.

Ada