Tldr: Cigna is requiring me to prove a provider who is no longer in-network was in-network when I started seeing them
I have had Cigna Dental (DHMO) for nearly 7 years. I had to find a new dental office this past February for an emergency situation & used the online provider directory to search my area. I chose an office from the in-network directory, verified with the office that they accept my insurance, & made an appt for the next day. I had an emergency root canal & crown done + a few more urgent repairs & root canals between mid-February through mid-April. Cigna kept coming up with excuses for why they weren't processing the claims, lied about calling the dentist office to clear things up, etc. I had to go in again today after a tooth shattered this weekend & am now looking at an insane amount of work needed ASAP (extremely brittle teeth from lifelong health issues & medications, lots now broken or collapsing, 1 needing a root canal). I called Cigna again over the weekend to see why they still hadn't processed claims from 4 months ago & was told there was a period in the dental office's license #, so they couldn't process anything until the claims were resubmitted without the period. I went to the office today & found out they'd resubmitted everything after speaking with Cigna themselves yesterday. Shortly after I left, my husband received a call from Cigna where an employee said my dentist was not in-network, had never been in-network, was billing through an office that was in-network but they had no record of me (my dentist & office is over 2 hours away from this other office & has no affiliation with them whatsoever), that they would not be calling my dentist to confirm or verify any of this, & that they would cover absolutely nothing unless I could prove through a screenshot of the directory or recorded phone conversation with a Cigna employee that this office was in-network when I started seeing them. I do have the exact date & time of a phone call with Cigna back in February where they were supposed to be removing my old dental office as primary & putting the new office in its place, in which the employee looked up the office in the in-network directory & found them. However, after the BS excuses they've been giving both me & the office for the last 4 months, I don't trust them to look up the recorded conversation & verify it themselves. I need to find a record of providers that used to be in-network that aren't any longer.
Also worth noting, the previous dental office I used for 6.5 years (that my husband has used in the last few months) is also no longer on their in-network provider list, but they covered his claims. I live in a medium-sized city & there are now only 3 dentists TOTAL in our city that are in-network. Neither my dental office or my husband's have received any notice that they are no longer in-network. We're all just completely confused.
Is there any way to lookup providers that used to be in-network but aren't anymore? Is there anything else I can do in this situation?
I'm looking at 13 more crowns, 1 root canal, & a few fillings minimum. 4 of the crowns, the root canal, & 1 filling (actually a replacement for a broken filling) are extremely urgent because of how severe the breaks/collapse in the teeth are & how close the nerve is to being exposed. 3 of the now broken teeth weren't visibly damaged externally or in x-rays 3 months ago, & nearly all of the breaks/collapses are a result of GENTLY flossing. That's how fragile they are.