Dr. Roxanne Dryden-Edwards has more than 30 years of healthcare experience.  

 Dr. Roxanne Edwards is an adult, child & adolescent psychiatrist.  She is a former chair of the Committee on Developmental Disabilities for the American Psychiatric Association, Assistant Professor of Psychiatry at Johns Hopkins Hospital, and Senior Psychiatrist at the Kennedy Krieger High School, in Baltimore, MD.Dr. Edwards served as the Medical Director of the National Center for Children and Families in Bethesda, MD., where she helped establish a quality assurance program.  

Dr. Edwards is co-editor and chapter contributor "Developmental Disabilities from Childhood to Adult: What Works in Community Settings", published by Johns Hopkins University Press.  She is also a contributing author to WebMD providing consultations on topics such as managing grief, drug abuse and Separation Anxiety Disorder.

Dr. Edwards received her undergraduate and medical degrees at Howard University.  She completed a residency in General Psychiatry at Sheppard and Enoch Pratt Hospital in Towson, MD. as well as a residency in Child and Adolescent Psychiatry at Children's National Medical Center in Washington, D.C. where she was Associate Chief Resident.  Dr. Edwards is board certified in General Psychiatry.

Office Hours: Monday and Tuesday 8:30 a.m. - 2:30 p.m. Thurs and Fri 8:30 a.m. - 5:00 p.m

Ext: 205


​​Dryden-Edwards Psychiatric Services


  • Psychotherapy
  • Depression
  • Anxiety Disorders
  • Counseling
  • Medical Illness
  • Marital Therapy
  • Parenting Support
  • Women's Issues

​​​​​​H. Brian Berthiaume, LCSW-C

​Mr. Berthiaume earned his Masters' in Clinical Social Work from the University of Maryland, Baltimore and his Master of Arts in Special Education from Trinity Washington University in Washington, D.C.  He established and ran three small high schools in Montgomery County, MD for students with emotional and drug/alcohol problems.  The Association of Recovery Schools has presented to Mr. Berthiaume the Jim Czarniecki Visionary Award for establishing the first recovery high school in the nation in 1979 and for his "outstanding contributions to the field of recovery schools. Mr. Berthiaume provides cognitive behavioral therapy for adolescents, adults and couples.  Mr. Berthiaume has been with the practice since March of 2004.  Ext: 305 


Mary E. Rouse, APRN, BC

Ms. Rouse received her Master of Science in Nursing from the University of Maryland and is board certified as a Clinical Nurse Specialist in Adult Psychiatric and Mental Health Nursing.  She has extensive experience treating anxiety, depression, and bipolar disorders as well as trauma and grief.  Ms. Rouse is trained in the uses of EMDR for relief of trauma symptoms.  She also works with eating disorders and weight management utilizing a bio-psycho-social approach.  Ms Rouse, a military veteran, is familiar with the challenges faced by veterans and their families.  She is also experienced in treating those with chronic pain.  Ms. Rouse has been with the practice since 1986.  Ext: 306


Elizabeth Stellhorn, LCSW-C

Ms. Stellhorn earned her Master's degree in Social Work from the University of Maryland and has been in practice for 24 years.  She works with adults with mood and thought disorders, as well as marital difficulties.  Ms. Stellhorn has also worked extensively with the elderly in outpatient settings, as well as nursing homes and assisted living facilities.  Ms. Stellhorn has been with the practice since November, 2009.Ext: 309


Cynthia Young, Psy.D.

Dr. Young earned her Bachelor of Arts Degree from Brown University graduating Magna Cum Laude with a membership in Phi Beta Kappa Society.  She went on to earn her Doctor of Clinical Psychology at the University of Illinois.  Dr. Young provides psychotherapy for adults and specializes in issues surrounding depression and relationships.  

She has been with the practice since June, 1997. Ext: 209


Tanya Hernandez, Psy.D

Dr. Hernandez earned her Masters Degree in counseling psychology from Towson State University and Doctorate in Clinical Psychology from Argosy University, The American School of Professional Psychology.   Dr. Hernandez provides psychotherapy services to adults, adolescents and children with depression, anxiety , ADD, ADHD, behavioral disorders and learning disabilities.  Her office hours are Wednesdays 8:30 to 2:30 p.m.  She has been with the practice since October, 2018.  Ext. 207


Xiujun Zhao, M.D. , M.D.

​​Dr. Zhao earned his Doctor of Medicine from Huabei Medical College in Tangshan, China.  He completed his residency from the University of North Dakota and is board certified in Psychiatry.  Dr. Zhao provides diagnostic assessment and medication management services to adults.  His office hours are on Fridays, 8:30  a.m. to 5:30 p.m. He joined our practice in January 2020.    Ext. 300


Michelle Tucker-Jones, CRNP, PMH

Michelle Tucker-Jones is a Board certified Family Nurse Practitioner and Psychiatric Mental Health Nurse Practitioner with 20 plus years of nursing experience in various specialties such as cardiac, medical-surgical,  home health, hospice, correctional medicine, travel nursing, occupational health and management. She has worked various institutions both large and small on the west and east coast allowing her to care for people from a multitude of diverse backgrounds. She completed her Masters of Nursing for Family Nurse Practitioner at Bowie State University and her Psychiatric Mental Health Nurse Practitioner degree at Washburn University. She holds a Post Masters certificate in Nutrition and Integrative Health and a certificate in Health Coaching. Mrs. Tucker-Jones has worked in Family Medicine, Rehabilitation Medicine, Functional Medicine, Mental Health, occupational medicine and has performed Veteran disability and compensation exams. as a Family Nurse Practitioner.  Mrs. Tucker-Jones’s goal is to assist people in achieving a healthy balanced mind, body and spirit.  Ext: 302


Faith Nguyen, M.S., PMHNP

Faith Nguyen is a Board Certified Family and Psychiatric Nurse Practitioner.  She has worked with individuals in medical and behavioral practices as a registered nurse, clinical educator and nurse practitioner in Maryland.  She has over 10 years  in clinical practice and serves as a guide/provider to many individuals in making lifestyle modifications and behavioral changes to lead fulfilling and productive lives.  Ms. Nguyen has been working with children and adults with issues ranging from ADHD, anxiety, depression, adjustment and mood disorders.  Her approach is highly collaborative, compassionate and non judgmental.  By integrating evidence-based principle and treatments throughout the treatment process, she fosters conscious steps to meaningful changes in addressing elements defined in treatment goals.  She is fluent in Vietnamese.  Ms. Nguyen's  office hours are on Tuesday - Thursday 8:30 am - 4:30 pm

ext: 208


Aldrin Ceballos, LCSW-C

Monday, Wednesday, Thursday 6:30 pm - 9:00 pm

​ext: 303


Lisa Gordon, M.D.

Friday 9:00 am - 12:30 pm

ext: 310


Tiruayer (Terry) Negatu, FNP-C, DNP, CNE, PMHNP-BC

Tiruayer (Terry) Negatu is a Board Certified Family Nurse Practitioner and Psychiatric Mental Health Nurse Practitioner with 15 plus years of experience in various specialties including urgent care, hospital care and private practice.  She completed her masters of Nursing at Bowie State University, her Doctorate of Nursing Practice at Chatham University and her Post Doctoral Certificate in Psychiatric Mental Health Nursing at Liberty University.  She recently joined DEPS in 2022 and will provide psychiatric evaluations and medication management services.