@kkckkjm, Thanks for the reminder for others that may read this in the future! You note has prompted some good discussion.
While others have mentioned that the biomarker/molecular testing is 'standard of care' in the USA, many rural clinics and insurance companies are lagging behind. The testing really is lifesaving, my own life included. My original insurance company also denied my claim. The biomarker company (FoundationOne) fought for payment on my behalf. Many of us on targeted therapies will experience progression of our cancer in the future, at that time biomarker testing should be performed again in order to determine if the cancer has mutated into another form with a targetable mutation. Unfortunately, our fight for insurance payments may not be over.
We're starting to see state-by-state legislation that requires insurance companies to pay for these tests, but progress is slower than any of us would like, and a federal solution would be preferred. Here's where we stand: https://www.fightcancer.org/what-we-do/access-biomarker-testing