CPT® Code 64405

I am looking at a bill that states 64405 / 4 units on the same day. Is this normal? Seems excessive? I am new to coding and I am working with limited assets. Any help is appreciated.

Thanks

Dec 3rd, 2013 - nmaguire 2,606

re: CPT® Code 64405

Medicare allows 1 unit per date of service

Dec 3rd, 2013 - Lawman 1

re: CPT® Code 64405

Thank you for the quick response.