[Lazamataz]

UHC, Humana, BCBS seem to have mid-level quality, far worse than State Farm and Allstate, but maybe a little above the ONC of CMS of HHS.

On what do you base this assessment?

[spintreebob]

On occasional communication with them. (I used to work for BCBS, State Farm and Allstate ... and 35 shops not mentioned.)

And on seeing the quality of their data that goes into my data warehouses.

In terms of data quality, State Farm and Allstate would fire anyone who produced the quality of any of the others listed.