Are All Hospice Doctors Certified By The State In Which

Are all hospice Doctors certified by the state in which they work? YYYY@YYYY
How do hospice Drs know the patients needs if they have many ie: lung, heart, diabetes etc. which have previously been treated by specialists, and is their assessment as knowledgeable as the specialist, and how? YYYY@YYYY

I'm a little leary of trusting a hospice Dr. after having my husband being treated by specialist Drs. for many years. YYYY@YYYY