Thanks Linda - when I have done consulting work with practices in my past life, I found it interesting some providers allowed changing CPT codes, some allowed only adding modifiers with their CPT codes (usually payor specific) and some allowed only ICD-9 diagnosis code changes, particularly adding 4th/5th digits if the dx code(s) they were submitting were invalid. I've always made a "rule of thumb" to never change a CPT code without the provider's permission/sign off and only after reviewing their documentation. You also bring up a very good point regarding the liability issue - it's one thing to make an innocent data entry keying error....and another to bill service(s) that you know or feel as a coder are going to be questionable with the payor. I just want to make sure my contracts define what the provider is responsible for and, acting on their behalf, what my liabilities are as a billing company. This is something I'm going to have my attorney evaluate in regard to any business contracts before they're signed. Of course, communication with the provider are key to any of these issues, but I want to make sure these are spelled out in any contract/compliance plan before any questionable scenarios arise. Thanks again!