•American Board Certified in Internal Medicine.
•American Board certified in Preventive Medicine / Subspecialty Addiction Medicine.
•Fellow American society of Addiction medicine.
•Member American society of Addiction medicine.
•Member American society of Internal Medicine .
•Member American medical Association.
•Alma mater : Sri Siddhartha medical college, Rajiv Gandhi university of health sciences, Bangalore India.
•CRRI: Sri Ramachandra medical college & research institute , Porur Chennai , India.
•Medical Intern : Flushing Hospital , Flushing New York USA .
•Medical Resident: Muhlenberg regional medical center / Robert wood Johnson University hospital New Jersey USA.
•Addiction medicine Fellowship training : Henry ford health system , Detroit USA .
•Current Hospital practicing : Providence St.Vincent hospital Portland and affiliated with all 8 Oregon Providence hospitals .
•Current position : Providence health system Regional Medical Director for Oregon State  , Division of Psychiatry & Addiction medicine .
•Primary Responsibilities: Addiction medicine division administration , Hospital attending physician/ Addiction Medicine Consultations, Residency & Fellowship teaching attending physician.
•Top Doctor Award USA 2021 : Addiction medicine specialty.
•Founder President & Member :
iNPNA - Nagarathar physicians of North America & International.
•Managing trustee : iNPNA India .
•Medical Director : iNPNA Star Clinic Rayavaram , Pudukkottai district , Tamil Nadu -622506 , India .
• Currently living in Portland/ Lake Oswego , Oregon USA with wife Kalyani Palaniappan.R.Ph ( Pharmacist ) , daughter Divya Palaniappan & Son Ganesh Palaniappan.
•Hobbies & Interests: Traveling, cooking , bicycling, gardening .