Dr. Tan was born and raised in Singapore. He came to the United States in 1997, and attended medical school at Loma Linda University, Loma Linda, California. He did his family medicine residency at Kaiser Permanente in Fontana, California.

He worked at Clínicas De Salud, a community health clinic in Brawley, California, offering comprehensive care to the medically underserved population. He served part of his time as the Assistant Medical Director during his 15 years of service. Dr. Tan joined the Imperial Valley Family Care Medical Group in 2012 to provide Family practice care in a private setting.