Dr. Alvaro Guzman

Executive Director

Dr. Alvaro Guzman is a compassionate and effective psychiatrist highly skilled in treating mental health and substance abuse patients. He is knowledgeable and capable in the psychopharmacology and psychotherapy of Mood and Anxiety Disorders. His interpersonal and communication skills allow him to work efficiently and empathically with his patients. He continually adds to his knowledge base by staying on top of established and evolving biological, psychological and social sciences. Dr. Guzman has demonstrated a commitment to carrying out his professional responsibilities and his reliability, ethical principles, sensitivity and curious mind make him a warm and caring therapist.

Dr. Guzman’s rich and varied clinical experience goes well beyond his formal Psychiatry training at St. Elizabeth’s Hospital in Washington D.C. His interest in research began at the NIH and continued at the School of Medicine at the University of Maryland. His commitment to clinical work with minorities and those with addictive behaviors in combination with his studies in social issues has helped him gain a better and deeper understanding of the human condition.

Dr. Guzman, fluent in English and Spanish, is Board Certified by the American Board of Psychiatry and Neurology.


Dr. Anca G Zinnes

Director of Mental Health and Substance Use Services

“The good life is one inspired by love and guided by knowledge.”- Bertrand Russell Dr. Zinnes is a graduate of University of Medicine “Carol Davila”, Bucharest, Romania. She completed both an internal medicine residency in Romania and psychiatry residency at St. Elizabeths Hospital in Washington, DC. Her ties to Andromeda go back to her residency years, when, under the guidance of Dr. Galbis, she completed her child psychiatry rotation at Andromeda. She returns after 10 years of being in private practice as a psychiatrist, with the firm belief that the integration of mental health care with general medicine is essential for best outcomes in treating all types of conditions. She is committed to providing her patients with the best of care and to also advocate for their social integration and destigmatization of mental illness. Dr. Zinnes has expertise in different areas of adult psychiatry, including geriatric psychiatry and substance abuse (suboxone certification), psychotherapy (Fellowship at Baltimore Washington Institute of Psychoanalysis), ECT (Duke University Fellowship), Deep Brain TMS(Sibley Memorial Hospital). She has admitting privileges at Sibley Memorial Hospital and Suburban Hospital. Dr. Zinnes is a Board Certified Psychiatrist and an APA Fellow.

Robert Browne

EIS Specialist

Robert Browne is from Washington, DC. He is currently finishing his studies as a Regional Fitness Program Manager at the California University of Pennsylvania. He is an EIS Specialist, a Site Leader for the Grocery plus (CAFB), and a Certified Personal trainer. Robert also completed a ServSafe Food Protection Manager Certification at the National Restaurant Association. Beside sports and being outdoors, Robert enjoys going to bookstores, poetry, good food, and arts and antiques items.

Sonia Carrion

Medical Assistant / Receptionist

Sonia Carrion, originally from Peru, likes to help and educate people. She wrote articles in “El Comercio” (Lima-Peru) newspaper concerning “Alcohol and Substance abuse” and advice for teenagers. She was a Health Promoter for the National Association of Girls Scouts of Peru. She also believes that working in the healthcare field is very gratifying and is planning to continue her education and get a nursing degree. She used to practice martial arts and loves to swim, read, dance and listen to music. Sonia Carrion graduated from Andromeda’s Medical Assistant Training Program and is excited about starting her new career as Medical Receptionist in Andromeda, a great place and environment with amazing people.

Mercy Cruz

Mental Health and Substance Abuse Counselor

“My greatest strengths are my abilities to listen and understand you, accept you, and support you. Building a meaningful relationship with my client is an essential part of the healing process.” – Mercy Cruz Mercy Cruz, a bilingual (English and Spanish) physician from Ecuador. She continued her education in the U.S. by obtaining a Certificate Addiction Counselor II in the District of Columbia and later acquired a Master Degree in counseling psychology from the University of Leon. She has over 10 years of experience in working with Hispanic substance users who are dually diagnosed with a mental health condition and have HIV/AIDS. She is accustomed to working closely with psychiatrists and infectious disease specialists and is skilled in formulating multidisciplinary treatment plans.

Silvia Figueroa

Medical Billing Specialist

Silvia Figueroa was born and raised in El Salvador and has been working at Andromeda since 1999. She started off as a medical receptionist and is now working as a Medical Billing Specialist. She became certified as a Medical Assistant after completing Andromeda’s Medical Assistant Training Program and is currently attending school to become Billing and Coding Specialist. In her spare time Silvia enjoys cooking, traveling, and spending time with her 3 sons & grandson.

Jalisa Holt

PrEP Program Director

“Yesterday is history, tomorrow is a mystery, but today is a gift, that’s why we call it the present.”― Bill Keane Jalisa Holt is focused on producing change that will have a responsible effect on the world. Beginning as an intern, she sought to engage the community through outreach and educational interactions emphasizing the importance of healthy life practices. Since becoming the PrEP Program Director, Jalisa has built and expanded multiple collaborations with the community throughout the DC metropolitan region, and continues to link persons of need to HIV prevention and treatment services. Before becoming a PrEP educator, Jalisa obtained a B.S. in Chemistry from Howard University and a MPH from The George Washington University. During her educational tenure, she worked as a research assistant traveling internationally to Barbados, Cape Verde, and Senegal. Jalisa is a native of Chicago, Illinois, but has called the DC Metropolitan area her home since 2008. Outside of work, Jalisa enjoys traveling and shopping, visiting family and friends, and spending time with her two dogs: Tiana and Snoop.

Deysi Nash

Medical Assistant

Dyasi Nash is a certified medical assistant/phlebotomist with more than 20 years of experience in medical settings. She has been working at Andromeda Transcultural Health for the past 7 years under the HIV Ryan White and Primary Care Department that’s benefited countless of patients throughout the years. Her career goal is to keep up with the ever changing rules, regulations, and laws in the medical profession. She continues to strive to make a visit to the doctor’s office a positive and good experience for each patient.