Terri , I was not happy about the way my case was handled by my Pulmonologist. The best thing he did for me was a referral to Dr Fiske , an ID doctor at Vanderbilt. I just saw her her Thursday and was very impressed with her knowledge of MAC/Bronchiectasis. I gave another sputum sample for culture AND susceptibility testing. She routinely sends all her cultures to National Jewish Health. (this also impressed me). She also started me back on Azithromycin and Ethambutol daily along with the Arikayce I have been taking. So now the long wait to get results back from the lab. So if anyone reading this is wondering whether or not to get an ID doc, wonder no more, he/she will be much more likely to be up to date on MAC/Bronchiectasis.