INR Self-Testing (aka ProTime) for anticoagulation test at home

What providers are covered by BCBSTX and does anyone at BCBSTX know what i'm talking about? 

My current provider Acelis Connected Health is 'out of network' causing me to scramble to find a replacement.  Im try to see if "BioTel Heart" is 'in network' but they came back with a squirly non-answer.

This should be fairly common with the number of people on blood thinners.  I don't understand why this has been such a pain in the ass to get solved.