The ICD 10 stuff confused me too at first. I was scrambling to find a reference online. Then I re-read the instructions :-)
Also, the HCPCS part totally confused me too. At first I thought I was missing a book in my shipment.
I don't really have the money right now to purchase extra books.
No one really warns you that there is more than one book or set of material you have to refer to in order to do all this.
Hang in there,
Sherry