If the site is specific to one profession, it belongs in the category for that profession, (in the education or continuing education subcategory if that exists).
For example, sites primarily about continuing education for nurses belong in Health/Nursing/Education/Continuing_Education, those for physicians in Health/Medicine/Education/Continuing_Medical_Education, etc.
Commercial sites (including those for pharmaceutical or healthcare services) do NOT belong here because any "education" they contain cannot be considered unbiased. Please send such sites to the appropriate category in Business/ or Regional/.
NB Teaching institutions and courses are not listed here, and belong under the specific profession involved.
Online courses are listed in Reference/Education/Distance_Learning/Online_Courses/Healthcare