The Osteopathic Postdoctoral Training Institution, or OPTI, is a system for structuring and accrediting osteopathic graduate medical education established by the American Osteopathic Association (AOA) in 1995.

Mountain State Osteopathic Postdoctoral Training Institutions, Inc.(MSOPTI) or Mountain State OPTI was accredited by the American Osteopathic Association in June, 1999. The consortium is comprised of a central member, the West Virginia School of Osteopathic Medicine, located in Lewisburg, West Virginia, and its partner hospitals. See Affiliated Hospitals for a list and locations of the MSOPTI partners.

While varied in size and scope, each MSOPTI partner hospital offers unique training opportunities for both pre and postdoctoral trainees. At the present time, postdoctoral training opportunities in the MSOPTI consortium include: traditional osteopathic internship programs, and residency programs in family practice, emergency medicine, internal medicine (with fast track internship), combined internal medicine/emergency medicine and pediatrics (with fast track internship). The consortium aims to establish additional primary care residencies and to expand the consortium by exploring potential new training sites.