surprise $3,847 balance bill arrived 6 months after my sons ER visit - turns out the radiologist reading the CT scan was an out-of-network teleradiology vendor even though the hospital and ER doc were in-network. is this still a No Surprises Act scenario or did i miss a window?

posting because this completely blindsided us and i want to make sure i am thinking about it correctly before i fire off appeals in the wrong direction. would love a sanity check from anyone who has been through similar.

setup. our 9-year-old took a hard fall off the monkey bars at school in december and the school nurse was worried about a head injury (brief loss of consciousness, vomiting on the way to the nurses office). we drove straight to the ER at our in-network hospital - verified in the parking lot via the BCBS app that the hospital was in-network, that the ER department was in-network, and that the on-call ER physician group at that hospital was in-network. felt like we did our homework.

at the ER, my son got a CT scan of his head (negative, thankfully - just a concussion, follow up with his pediatrician). total visit was about 4 hours. we got the in-network EOBs over the following weeks - hospital facility charge ($6,200 billed, $3,100 contracted, our share around $850 after deductible), ER physician charge ($1,400 billed, $720 contracted, our share around $180), all processed cleanly as in-network. paid both, moved on.

then last week - six months later - we got a bill in the mail for $3,847 from a teleradiology group i had never heard of called "Nighthawk Radiology Services" (not the actual name but similar). the bill says it is for "professional interpretation of CT head, December 2025" and that the carrier paid $0 because the provider is out-of-network and the patient is responsible for the full billed amount. the bill is the FIRST notice we have ever received from this group - no statement, no carrier EOB, nothing for 6 months.

i called BCBS and the teleradiology group on the same day. heres what i learned and where i am stuck:

(1) the hospital uses a third-party teleradiology vendor for after-hours radiology reads. the CT scan was taken at the in-network hospital by in-network technicians using in-network equipment but the actual READING of the scan (the radiologists professional interpretation) was performed remotely by a radiologist who is part of this out-of-network teleradiology group based in a different state. patients are never told this at the time of service - it is a back-end operational thing.

(2) BCBS told me on the phone that the claim was originally submitted by the teleradiology group in january, processed as out-of-network, and the carriers payment was $480 (the carriers "allowed amount" at the OON rate). the patient responsibility per the EOB was $3,847 (the balance). BCBS sent the EOB to the address on file at the time. we never received it. BCBS confirmed that the address they used was correct so apparently it just got lost. our address is still the same.

(3) the teleradiology group sent the bill directly to us in june after six months of no payment from us, treating the patient responsibility as billable to the patient. their billing rep on the phone was clear that they expect payment in full and that the patient is responsible because the patient signed financial responsibility paperwork at the ER.

(4) i raised the No Surprises Act with both BCBS and the teleradiology group. BCBS said the visit date was december 2025 and the NSA went into effect january 1, 2022, so the NSA should apply. they offered to "review" but the rep i talked to was clearly not familiar with the NSA mechanics for ancillary providers at in-network facilities. the teleradiology billing rep said they were "aware of the NSA" but argued that the NSA only applies to emergency services AT THE FACILITY and that interpretation services performed remotely by an off-site provider are not covered. that argument sounds wrong to me but i am not 100% sure.

where i think i am:

(a) the NSA explicitly covers emergency services at out-of-network providers AND ancillary services at in-network facilities by out-of-network ancillary providers. radiology is specifically named as one of the ancillary specialties covered. my reading is that the teleradiology read is an ancillary service that was performed in connection with an emergency visit at an in-network facility and should therefore be covered as in-network for cost-sharing purposes.

(b) the teleradiology group cannot balance bill us beyond the in-network cost-share for an NSA-covered service. so they cannot collect $3,847.

(c) the carriers payment ($480) may or may not be the correct QPA - that is a carrier-provider dispute that we as the patient should not be in the middle of.

(d) the in-network cost-share for our plan on this service would have been some small coinsurance amount - probably $150-$300 range, not $3,847.

specific questions for the community:

(1) am i reading the NSA correctly that this teleradiology scenario is covered? specifically, does the NSA distinguish between an ancillary provider physically present at the in-network facility (like the in-house pathologist) vs an ancillary provider performing the interpretation remotely (like the teleradiology group)? i cannot find clear guidance on the remote-vs-onsite distinction.

(2) does the 6-month delay in billing affect our NSA protections? we never received the original EOB so we did not have the chance to dispute earlier. is there a deadline by which we had to invoke NSA protections that we may have missed?

(3) how do we get the teleradiology group to actually apply the NSA and rebill correctly? do we need to go through BCBS, file a CMS NSA enforcement complaint, file a state DOI complaint, all of the above? what is the actual mechanism for forcing the bill to be re-issued at the in-network cost-share?

(4) the bill is now 6 months past service date. is there a risk that the teleradiology group has already sent this to collections or will do so imminently? we have not received any collection notices yet but i am nervous. should we pay the in-network cost-share amount (whatever that turns out to be) preemptively to prevent collections while the dispute is pending? or hold the line and dispute the full amount?

(5) any specific language for the appeal letter to the teleradiology group? i found a few NSA template letters online but they all assume the patient knows the dispute is happening at the time of service. our scenario is "you sent us a balance bill 6 months later and we need you to rebill under NSA" which feels slightly different from the typical template.

thanks in advance. so frustrating that this is a thing you can do everything right at the time of service (verify in-network, get the in-network EOBs that confirm in-network processing, pay the in-network shares) and then six months later get hit with a $4k bill from a vendor you never knew existed. ugh.