HMA is one of the largest Third Party Administrators of self-funded health plans in the Southwest. For nearly 30 years, HMA has provided Third Party Administration services including claims adjudication, medical management and customer service to Employers, Payers, Taft-Hartley Trust Plans and Native American Tribes.  HMA works with groups of all sizes including its smallest group of 100 lives and largest group of 27,000 lives.