A graduate certificate or diploma (the terms are used interchangeably in North America) in medicine denotes specialization in a sub-field or discipline of medicine gained through intensive graduate-level study. As such, it supplements an already established area of expertise (in medicine or not related to the field) and adds value to a previously earned Bachelor's or graduate degree. Delivered in various formats from residential to online, graduate certificates in medicine comprise 4 - 6 courses (typically 12 - 18 credit hours) taken in a prescribed sequence at the graduate level.
The concurrent graduate certificate or diploma in medicine allows students currently enrolled in a Master's or Doctoral degree program in the field to pursue an in-depth exploration of one aspect of their field. For example, a student working towards a Master's in Medicine may also take the Graduate Certificate in Pharmacy Sciences to augment their expertise.
The stand-alone, direct-entry graduate certificate/diploma program in medicine provides an opportunity for graduate-level study of theory and research to students who are not interested in pursuing a full graduate degree. This could include professionals with a Bachelor's degree working in the field or anyone who does not have the time or interest in a traditional graduate program in medicine. Then too, some students who take the stand-alone certificate already have a graduate degree and use their certificate to augment a particular area of interest.
A selection, but not inclusive list, of graduate certificates/diplomas in medicine includes

Graduate Certificate in Aging and Neuroscience

Graduate Certificate in Biochemistry & Molecular Biology

Graduate Certificate in Bioinformatics

Graduate Certificate in Biotechnology

Graduate Certificate in Child Psychiatry

Graduate Certificate in Clinical Investigation

Graduate Certificate in Global Pediatric Health

Graduate Certificate in Health Sciences

Graduate Certificate in Industrial Health

Graduate Certificate in Medical Biochemistry, Microbiology and Immunology

Graduate Certificate in Medicine & Gender

Graduate Certificate in Metabolic and Nutritional Medicine

Graduate Certificate in Molecular Medicine

Graduate Certificate in Pharmacy Sciences

Graduate Certificate in Regulatory Affairs