If you are in a "watch and wait" situation, and you and your pulmonologist are diligent about monitoring your health, you probably don't need an ID doc - Now. If you reach the point where you are taking the antibiotics, and your body does not respond after about 5-6 months (this is a very slow process) that is time to bring in an ID doc - one who is familiar with treating MAC. I waited for a year because my pulmonologist didn't think I needed one, and it just prolnged my treatment.
Do you feel your pulmonologist is familiar with MAC and bronchiectasis? Have you been recommended to do daily airway clearance? To use 7% saline to tamp down the bacteria?
Sue