Is the one call care diagnostics customer center 24 hours? The One Call Care Diagnostics Customer Center can be accessed 24 hours a day, 7 days a week. I am somewhat concerned about the confidentiality issue. How do I know the website is secure? One Call Care Diagnostics utilizes Secure Socket Layer (SSL) technology and third-party software to ensure the security of your website.How do i contact the one call care customer center? If you have not been contacted within three business days, please email us at Customer Center Help Desk [[email protected] ] and someone will assist you. Thank you for registering for the One Call Care Diagnostics Network Portal.How do i contact onemedical? We’re always here to help. Just give us a call at 206-267-4392 or drop us a line at [email protected] and we’ll take care of you. If you’re an existing member, the best way to get in touch is to message us through the One Medical app for iPhone or Android.What does one call medical inc do? One Call Medical Inc. is one of the leading providers of quality diagnostic imaging and electrodiagnostic services in the united states. Located in Parsippany. N. J. . It offers a nationwide MRI/CT/EMG services. The Company products and services. Such AS workers' compensation. Group health and auto insurance. One Call... Posted on July 10, 2011.