I think that a the MD are using algorithms in their daily practice, from screening, imaging to genomics depending on the specialty I think that the practitioner is more confident on the obtained result by comparing it to other devices or protocols or at what we knows/learns through time and experience. Also another kind of algorithms are the guidelines emitted by national or international medical societies and also pharmacological studies...I do not know if using a diagnostic-assistant is what you are interested about...but maybe in the future AI would help more to filter/propose paths for non conventional symptomatology or biological/imaging combination observations...The main problem is that even informatics and algorithms are also a human science product, so errors could be also generated...maybe if these algorithms would be more efficient than humans i guess we would develop another way of practicing medicine like in Star Trek ;)

In our setting I think they are using algorithms indirectly or without knowing that they using algorithms