About Us. Signature HealthCARE of Portland Rehab & Wellness Center is a 112-bed long term care/rehab-to-home facility located in Portland, TN. Signature HealthCARE of Portland provides comprehensive behavioral services for dementia, Alzheimer's disease, and other related disorders. The vision, to radically change the landscape of healthcare, forever. Through education and empowerment, we earn the trust of every patient, family member, and the com...