American HomePatient is one of the largest home health care providers in the United States. Located in Tulsa, Okla., it has operations in 33 states. As a full-service respiratory company, it provides oxygen equipment and supplies, patient assessment and follow up as well as sleep therapy equipment, such as continuous positive airway pressure (CPAP) supplies. Other service offerings include infusion therapy and parenteral/enteral nutrition. American HomePatient is accredited by the Accreditation Commission for Health Care (ACHC).