Wiki Billing for Provider Services outside of Office

[em2177]

I need some guidance to find any specific information in regards to billing for Physician services outside of the normal clinic office setting. We had an unexpected flooding in our building and we had to relocate our Physician to another building. Patients are Medicare. What code would we use to submit to billing since the services being provided are outside of our normal clinic setting? We are an FQHC facility. Any guidance is highly appreciated. Thank you.