DES or Medical Certificate?

Was recently exited from DES after two years. Centrelink rang me today and told me I need my doctor to fill in a form listing my medical conditions so that CL could request a new ESAT for me. She told me she would send me the relevant form for the doctor to fill out but she didn't Don't recall the document mumber? But not SU415.

That said I believe if I get my doctor to fill in the SU415 as he has done in the past (not for the last 18 months) and I get a medical exemption for a few months or even a year that in itself will lead CL to request a new ESAT as has happened in the past. That way I get a much needed break from mutual obligations and an appointment for a new ESAT. Does that sound right? Thanks for your help.