Compassionate care for adolescents and adults. OIP offers traditional medication management, alternative medicine, IEP/504 advocacy, as well as behavioral, relational, and supportive therapy. In-person or online for your convenience with weekend and evening availability. Mariel Otter, DNP, CRNP-PMH has 13 years of Baltimore-based psychiatric experience. She is an alumna of Johns Hopkins University and University of Maryland with clinical training from renowned psychiatrists including Dr. Scott Aronson, MD, and Dr. Larry Alessi, MD. Mariel Otter, DNP, CRNP-PMH is rated as an expert in the treatment of depression, anxiety, and bipolar disorder by U.S. News and World Report Health and is a Healthgrades "Patient Favorite".