Certified Occupational Therapist Assistant (COTA) About us Mercy Hospital Ada, Oklahoma, is a 159-bed, acute-care facility serving Pontotoc County and the surrounding areas in south-central Oklahoma. Our hospital provides vital health care services to the Ada and surrounding communities. How you'll contribute The Certified Occupational Therapist Assistant (COTA) provides direct patient care under the supervision of an occupational therapist, assisting with therapeutic...