Swedish Pediatrics - Edmonds

My son had an appointment at Swedish Edmonds pediatric clinic for annual wellness check. On the appointment day one of the medical assistants send us in the exam room and we were waiting for doctor more than 1 hour! After a month we received a bill for $340.00. My son has active insurance and Swedish is in the network, but for some reason, the clinic did not send any claim to the insurance and the billing department sent us a bill of $340.00 for this visit. They sent us this bill every month (3 times so far) and each time we contacted the billing department and the clinic, and they supposed to fix it, but we were surprised with a new bill every month. We contacted the insurance company several times and they said we did not receive any claim from Swedish. Also, I checked my insurance account online and I do not see any claim from Swedish pediatric clinic. Finally, we paid $340.00 OUT OF POCKET for just annual wellness check.