Hey! I'm like 9 days after this post and I still haven't heard anything yet about Hopkins PhD in Mental Health, it's so great.
I applied for psych epi too.
Hi mdtl54,
I'm the one that posted the interview invite for substance use epi. I received an e-mail from the progam's director and academic coordinator with another application form for me to fill out, and was then invited to have an interview with the academic coordinator. So to answer your question, it's an admin interview.
Surprised to see that no one else has received any invites from Columbia!