A few months ago, Xifin published a blog that United Healthcare would begin using MolDx Z-codes (here), presumably through a licensed arrangement. (United had announced a separate, non-Z-code test registry last summer - here). I was googling for any updates to the MolDx/UHC relationship, and I hit a number of articles bringing UHC and MolDx together. (I didn't any updates, besides that Xifin article, on Moldx and UHC).
UHC Provides Long Tables of Hyperlinked MolDx Articles
UHC has a 21-page document and a 52-page document that, in general, provide hotlinked libraries of related MolDx policies, for example, the policies published under separate index numbers by Palmetto, Noridian, WPS, and CGS.