As a fully-integrated teaming partner with Diamond Solutions, Inc., ZAI operated a call center from 2011-2018 for the Department of Defense (DoD) Integrated Referral Management Appointing Center (IRMAC) to schedule medical appointments, validate insurance coverage, and provide medical referrals. The IRMAC Call Center supported the four primary DoD Military Treatment Facilities (MTFs) in the National Capital Region (NCR) and handled 780,000 calls per year from patients seeking medical appointments or referrals to medical specialists.