Cristina Desa, MSN, PMHNP-B. Cristina received her nursing degree from St.Elizabeth's Hospital School of Nursing and her Master's degree from Regis College. She is Board Certified by the American Nurses Credentialing Center as an Adult Psychiatric Nurse Practitioner. Ms. Desa has worked with the severely chronically mentally ill for over 11 years in the community. Her clinical interests include mood disorders, anxiety, depression and ADHD. She is fluent in Portuguese and sensitive to cultural differences.Cristina works in the Winchester office.