Does the ACCME accredit individual activities?

No.  The ACCME accredits organizations that produce CME activities.  The accreditation process includes the review of CME activities for the demonstration of compliance with the ACCME’s requirements.  For more information, check out the ACCME’s description of the accreditation process for first-time applicants here:

http://www.accme.org/cme-providers/first-time-applicant