Description. . Mobile Phlebotomist — Denver, CO. American Health Associates. |. Part-time & flexible schedules. |. Now hiring. Who we are. American Health Associates is the nation’s largest clinical reference laboratory dedicated to long-term care — bringing 35 years of diagnostic excellence to patients in 2,500 healthcare facilities nationwide, powered by 14 full-service, CAP-accredited laboratories. Our mission is simple: empower patients with ...