I clicked on the link in https://www.unitedhealthgroup.com/ns/health-data-breach.html that points you to sign up for the monitoring service.
i created an account and at the top it shows "Have you been supplied a code to enroll in monitoring? Enter it now to enable monitoring and get fully protected."
I do not have a code, so i do not know if the monitoring is on.
Only thing i see is orange circle under Services on the dashboard and it shows "activated services". This is not clear if this means monitoring is on, so some form of email to the user would be good.
I received the same message and was never supplied with a code. Apparently, others have received the same message and reported it, but you have not replied to anyone's concerns.