I think many pcps and general pulmonologists don't know much about bronchiectasis and MAC, which was the case with my general pulmonologist. And now the knowledge is advancing more rapidly. I was first diagnosed by CT scan in 2012 after an X-ray ordered by my PCP at the time was flagged for further evaluation. My PCP called it "idiopathic" since it was stable & asymptomatic. I didn't even get followed by a pulmonologist for years, & when I did, he wasn't aggressive about the developing chronic cough since it was mild. It was my now-PCP who insisted on finding a cause & because of him that I wound up with bronchiectasis/ MAC specialists.