Mariana Nicholls

Dr. Mariana Nicholls joined Columbia Health in 2021. She received her Ph.D. in psychology from Northeastern University and her M.A. in Mental Health Counseling and Behavioral Medicine from Boston University. Prior to joining Columbia Health, Dr. Nicholls completed post-doctoral training at Yale Health, providing individual and group psychotherapy to undergrad and graduate students. Dr. Nicholls completed her pre-doctoral internship in clinical and community psychology at Yale University, providing individual and group psychotherapy to monolingual Spanish-speaking populations and children and adolescents. She has also completed clinical rotations in outpatient and residential settings at Mclean Hospital and community health centers in Boston.

Dr. Nicholls enjoys working with students in either English or Spanish to explore concerns regarding identity intersectionality, LGBTQ+ and racial/ethnic identity development, acculturation, and being a first-generation student. Her clinical interests include the treatment of OCD, anxiety, trauma, and depression. In her clinical work, Dr. Nicholls tailors treatment to each patient’s needs exploring techniques from both psychodynamic and cognitive-behavioral approaches, while implementing a culturally responsive approach to acknowledge the nuances of identity intersectionality.


  • Post-doctoral Fellowship, Yale Health, Yale University
  • Pre-doctoral Fellowship, Clinical and Community Psychology, Yale University
  • Ph.D., Counseling Psychology, Northeastern University
  • M.A., Mental Health Counseling and Behavioral Medicine, Boston University
  • B.S., Psychology and Family/Child Sciences, Florida State University

Certifications and Licensure:

  • Licensed to practice psychology in the State of New York


  • American Psychological Association
  • National Latinx Psychological Association (NLPA)

Languages Spoken:

  • English
  • Spanish