Onco Dx test

I had the oncotype testing done.  I had no node involvement and my cancer was hormonal.  A part of the cancer was sent off to be tested, they give it a rating, depending on the number that comes back they ascertain what they believe the chances are of it returning.  My reading was very low, based on that I was told that I wouldn't need chemo, just radiation and Anastrozole for 5 years.
The test is very expensive $4000 and cant be claimed back through medicare or private health funds.