Both MD and DO degree holders must complete Graduate Medical Education (GME) after medical school in order to practice medicine in the United States. Practicing physicians holding the MD will have completed GME training at a program approved by the Accreditation Council for Graduate Medical Education (ACGME). Practicing physicians holding the DO will have completed GME training at a program approved by either the American Osteopathic Association (AOA) or ACGME. Starting in 2020, all GME programs will be accredited and governed by the ACGME. The AOA will no longer function as an accrediting body for GME. Historically AOA-approved GME programs will either gain approval by the ACGME or dissolve.