Now offering Text-to-Pay, click here for more information! Pay Bill Online: Mt Baker Imaging  (Account number starts with IMBI): Pay Here For questions, please call (360)788-9196 To mail your Mt. Baker Imaging payment, please send to: PO Box 24326 Seattle, WA 98124 Northwest Radiologists  (Account number starts with INWR): Pay Here For questions, please call … Continue reading Billing