I started with the Coumadin clinic, but quickly switched to self testing. Initially, they asked that I send them my results through their portal each week. I did so, and their replies were always something like this:
"Good job. Keep taking 3.5mg of warfarin daily."
Then I found out that each week when I reported my results to them, they were billing me $550 just to report this info and for them to give me a pat on the back with that one line reply. As I just had surgery I was over my deductible, so insurance paid 100% of each of their claims- I think about $3,300 total. I called and told the clinic I was no longer going to give them my results, as this was outrageous. Their reply was that most patients never have an issue with it, because insurance just pays for it. It is so wrong in my view for them to charge these rates. I told them so, and they suggested that I at least report results once per month, as I was under their care and they had a responsibility and that I would need to at least do this to get my prescription for warfarin refilled.
One message to my cardiologist was all it took to get out from the Coumadin Clinic. I gave him my results from the past 6 weeks and assured him I would bring my Excel spreadsheet to each follow up appointment. He is now the one who prescribes and refills my warfarin prescription.
At my first follow up appointment with him, I brought pages of my INR result spreadsheet, demonstrating that I stay in range over 90% of the time. He no longer asks me to bring the data- he trusts me. My last message to him was to ask him to reload prescription, told him my current dose and that I'm still in range over 90% of the time with weekly testing. He called in my requested prescription refill immediately.
Personally, if I did not have a trusting adult relationship with my cardiologist, I would keep looking, but I know that in some areas one does not always have this luxury. There are also often otions for virtual follow up appointments and perhaps an online trusted relationship can be established with a cardiologist, if a local one can't be found willing to work with you.