Https://ophthalmology.wustl.edu/app/uploads/formidable/9/complete-list-of-official-quickentm-customer%C2%AE-service-numbers-guide.pdf https://ophthalmology.wustl.edu/app/uploads/formidable/9/complete-list-of-official-quickentm-customer%C2%AE-service-numbers-guide.pdf