My son Timothy had a negative sweat test (34) and he doesn't have symptoms consistent with CF- and Emily's CF team refused to just assume he didn't have CF after his sister was dx'ed until genetic testing cleared him, saying he could be largely asymptomatic for many years but preventative care was still very important in the meantime should he actually have CF. Insurance paid for his Ambry Amplified test no questions asked. His brother was also covered with a borderline sweat test (48.) I know the situation is different but he was covered with a negative result so wanted to mention it. And our insurance is not known to be the best.
I think before bothering with more carrier testing for your dh you should just go straight for the Ambry Amplified for your son. You really do need to know- take this from someone whose dd was NOT treated for many years, one major issue being growth failure. Being in the 10th percentile at an older age is not so easy to address after going on for years and can have serious repercussions for pulmonary health, as you already know.
I do not think insurance will give you any problems considering he has several symptoms that *could* be consistent with a CF diagnosis and he's already known to have at least one mutation. Ambry will also directly work with your insurance carrier to help get coverage.
I think before bothering with more carrier testing for your dh you should just go straight for the Ambry Amplified for your son. You really do need to know- take this from someone whose dd was NOT treated for many years, one major issue being growth failure. Being in the 10th percentile at an older age is not so easy to address after going on for years and can have serious repercussions for pulmonary health, as you already know.
I do not think insurance will give you any problems considering he has several symptoms that *could* be consistent with a CF diagnosis and he's already known to have at least one mutation. Ambry will also directly work with your insurance carrier to help get coverage.