My investigations and enrollments for health care started trying to find COPS, when that appeared to be a dead end I registered at a Clinic associated with H. Fernandez - the name of the service I registered under is Centro de Salud - which appears to be the governments master plan for health care service (but they never disowned publicly COPS and it still hangs on). Recently, getting a look at their computer screen of my health service account, it said I am also registered with COPS. Separately, recently I received a solicitation to Emergency Salud which I'm still trying to figure out - what they really provide for their very low monthly enrollment. Meanwhile I am being hounded with one of their phone solicitors to sign up and provide a credit card over the phone. And I don't use the word 'hounded' lightly.
The e-mail notice I wrote about "Turnos Salud" came I believe as a result of 1 - registering with Centro de Salud 2 - getting 'empadronado' at a public window at H. Fernandez 3 - standing in line and getting a 'turno' for an appointment with an Ophthalmologist. Also, after registering with MiBA website I was able to see this appointment in my "Turnos" box. So I was aware. Them sending an e-mail on top as a reminder was a surprise and a bonus.
COPS and their sign up window does still exist in at least one location - jantango sent me photos of their office box at H. Mejia. Eventually I will go there to find out who/what I am to them.