@lindam272, you questioned about asking your ID doc for another CAT scan since it's been over 6 months since last scan. I agree with @katemn who mentioned the concern for radiation. Many people, unaware of the radiation risk, push for tests. My pulmonologist alternates each year, one year x-rays and the next CAT scans. He is concerned about the radiation in both x-rays and CAT scans, recognizing they are the best, least invasive diagnostic tool there is. Also, don't be surprised if it appears in your lungs that the NTM has 'shrunk' but then appears somewhere else ... my pulmonologist says that the nature of the disease.

Here's an interesting article ... "Should you worry about the radiation from CT scans?"
https://www.washingtonpost.com/national/health-science/how-much-to-worry-about-the-radiation-from-ct-scans/2016/01/04/8dfb80cc-8a30-11e5-be39-0034bb576eee_story.html?utm_term=.0fbe51228da7
Hope you are feeling well.
Paula

Paula, Wow! Thanks so much for the information. I had no idea! I'm doing pretty good. I have some bad days here and there, but am pretty good for the most part. thanks for asking. Blessings, Linda

Thank you for posting this info about CTs and X-rays. I have had so much
radiation over the last 20 yrs from both; that I can't help but think THAT is
what is wrong with me! (Said this with tongue in cheek - sort of!) Terri
M.