ACT Health's chief medical officer Jeffrey Fletcher has quit, and is due to step down and leave Canberra later in the month.

Dr Fletcher, who is also a senior staff specialist at Canberra Hospital, has been in the role for the past 20 months.

The resignation comes after a string of high-profile departures at ACT Health, including the resignation of director general Nicole Feely in March and the CEO designate of Canberra Health Services Janet Anderson just days after she was appointed in August.

Dr Fletcher emailed colleagues on Monday saying he had decided to step down from the role as of November 21.

He said in the email he did not have a job to go to and would be looking for roles in the near future outside of Canberra.