I work as a PCMH Case Manager (embedded in a clinic, employed by an insurance company), and our primary duty is disease management of patients with COPD and Heart Failure, although with all of the co-morbid conditions, deal with many other diseases and their management.
Broad answer as to what I do on a daily basis? Anything and everything. My day starts out checking my voicemail and then daily patient weights, and I then start calling patients at home to check on them (routine follow up calls), in between seeing patients in the office. I also do chart reviews of patients in the hospital, calling SNFs to get a weekly update, call the in-patient care manager to discuss a patient that is hospitalized; and the list goes on.
We have protocols for dealing with Heart Failure and COPD exacerbations, and also titrate insulin. The day never goes as planned, as there is always someone calling with an acute problem-if you are obsessive compulsive, that in itself can be unnerving, as you have to put off your routine calls to another day, but not unlike hospital nursing where you have to deal with an acute problem in addition to the other things you do (the difference being that you are responsible for "catching up", whereas in the hospital the next shift picks up the things you didn't get to)
Other things I often do are consulting with the PCP, calling the Aging Office to refer for services, calling a DME to setup oxygen, calling for an appointment to get someone in to the specialist asap, consulting with a pharmacist if there are med issues...
It's basically micro-managing those with complex chronic health issues.
Despite this neverending workload, I love my job. With all of the changes coming to healthcare, this is the place to be. Good luck!