Marc Leib is both a physician and an attorney. He has a history of strong
leadership in Arizona’s medical community. Dr. Leib is the former
Chief Medical Officer of the Arizona Health Care Cost Containment System
(AHCCCS), Arizona’s Medicaid Program. He determined the clinical
policies governing the care provided to over 1.5 million Arizona residents
in AHCCCS. Dr. Leib was the longest serving CMO in AHCCCS history, having
served in that position for just over ten years.
Dr. Leib, an anesthesiologist by training, practiced medicine for over
twenty years. Most of those years were in Tucson, Arizona, where he helped
grow an anesthesiology practice from twelve, to over sixty members. During
this time, he was very active in the medical community. Dr. Leib served
as the Chair of the Department of Anesthesia for six years in one of the
large hospitals in Tucson. He also participated in the Arizona Society
of Anesthesiologists (AzSA) and the Arizona Medical Association (ArMA),
eventually leading both organizations as president.
During Dr. Leib’s last few years of active practice he attended the
University of Arizona College of Law. Upon graduation, he worked at a
large law firm in Washington, D.C., primarily on health law issues involving
the Centers of Medicare and Medicaid Services and the Food and Drug Administration.
Upon his return to Arizona to run AHCCCS, Dr. Leib remained highly visible
in the medical community, serving on numerous national committees for
the American Society of Anesthesiologists, and chairing one of the organization’s
largest committees. He is also very active in the American Medical Association/
Specialty Society RBRVS Update Committee, commonly known as the RUC. Dr.
Leib chaired the Medicaid Medical Directors Network, which is a national
organization of Medicaid Medical Directors and Chief Medical Officers
from each Medicaid program. At the local level, he remains active in both
ArMA and AzSA.
Dr. Leib received his Juris Doctor Summa Cum Laude from the University
of Arizona College of Law, Doctor of Medicine from the University of Arizona
College of Medicine and his undergraduate degree, a Bachelor of Science
with Honors—Electrical Engineering, from Stanford University.
Dr. Leib balances his professional life with a number of personal activities,
including kayaking, hiking and reading. He also enjoys writing and publishing
articles of interest and essays in medical and legal publications.
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