I have been Dr. Chang’s patient for 5+ years. She is very knowledgeable, kind, and personable. I appreciate her approach of gradually layering different types of treatments, because she wants to keep the results natural looking, or to see how my skin would respond to a particular treatment (topical, pill, laser). We eventually came up with a year-round regimen to treat my melasma. Office staff are kind and professional. Office space is clean and beautiful. Overall, I am happy that Dr. Chang and Union Derm are part of my investment in my well being.