I bill for a PCP who does Home Health Aid certifications. We are having trouble finding guidelines as to what documentation is required to bill a G0179. The only thing I get from my physician is a "Home health certification and plan of treatment". This is what I have been billing from, but recently I received one that has a current signature, but the certification period on the top is for 8 months ago. Is this valid, or do we need a more current form from the Home health agency? Common sense would say we need a current cert period, but is there anything in writing that I can take to my physician?