Dr. Mareiniss is a board certified Emergency Medicine doctor in clinical practice at Einstein Medical Center in Philadelphia.  He completed his residency training at The Johns Hopkins Hospital.  While at Hopkins, he pursued research in pandemic response and influenza.  He has authored multiple peer-review publications and received the resident research award while at Johns Hopkins.  

Dr. Mareiniss graduated from Dartmouth College cum laude with an AB in Genetics & Developmental Biology.     

He obtained his MD from the NYU School of Medicine, where he graduated at the top of his class and was a member of AOA.

He completed his Emergency Medicine Residency at The Johns Hopkins Hospital, where he pursued additional training in Critical Care as well.

Dr. Mareiniss has served as medical faculty at the University of Maryland and Georgetown University.  He  was previously the Chair of Ethics at MedStar Franklin Square Medical Center in Baltimore, MD.  Currently, he practices Emergency Medicine at Einstein Medical Center in Philadelphia and is an Assistant Professor of Emergency Medicine at the Sidney-Kimmel College of Medicine of Thomas Jefferson University.  

He has served as a medical expert, ethics consultant and has published and lectured extensively on disaster response, pandemic response and medicolegal issues.  

Emergency Medicine

Critical Care

Pandemic Response

Altered Standards of Care


End-of-Life Decision Making


Emergency Vehicles

Any opinions given by Dr. Mareiniss, either oral or written, do not constitute medical advice or treatment recommendations.  

Disclaimer -  Any communications or opinions given by Dr. Mareiniss, either written or orally, are not intended to be and do not constitute medical advice or treatment recommendations nor do they constitute legal advice.  No communication or contact through this website establishes a patient-physician relationship or an attorney-client relationship.