@mali I can’t be of too much help with recommendations for NTM specialists in California as I am still working on the issue myself. If you search past discussions you will find some recommendations others have made. I am in Bay Area and here UCSF has a BE/NTM specialty practice which looks like it could be a great resource but I don’t have any personal experience with that practice. I believe at least one other member has commented that they are a patient of the UCSF BE/NTM practice and had good things to say about it. That said, I have read Hawaii has one of the highest infection rates with MAC/MAI so I would be surprised if there is not someone local-ish to you that specializes in NTM. Good luck!