Accredidation.........yes. Long story short, it definately does not hurt to be "acrredited" by both the AOA and the AMA.
Dual board certification is different, but equally benificial.......meaning, doing a dual residency (i.e. Family Practice/Emergency Medicine) will result in you being board certified in both specialities.......and you could practice as an ER doctor and a Internal Medicine doc if you wanted.........
The big benefit to doing a dual residency is that it gives you not only more "certifications" but options as well...............If a physician completed the FP/EM residency, he could open a family practice later in his career after doing EM for a time..........
Also, many states are adopting rules that won't allow you to practice within a certain feild of medicine unless you are "residency trained" in that feild.............meaning, in the past many docotors could practice in the ER if they went and to the EM boards, etc............not that simple anymore. In the future, if you wanted to work in an ER after years in a FP clinic, you would have to go do a EM residency..............with the all that that implies ( low pay, long hours, etc.....)
Options......!
But it depends on the program as to whether or not you would have AOA accredidation or AMA.........or both...
Please correct me on the AOA/AMA stuff if I am wrong.....