Golden & Matz LLC Logo facebook logo-blue twitter logo-blue box

Our team is ready to help you on your journey

Along with an educated and caring staff we offer the most up-to-date diagnoses and personalized treatments.

What can I expect at my visit?

David B.K. Golden, M.D.


Jonathan Matz, M.D

Jonathan Matz is Board Certified in Internal Medicine as well as Allergy & Immunology. He attended the George Washington University School of Medicine in Washington, DC, and completed his Residency in Internal Medicine and Primary Care in the Department of Health Care Sciences at George Washington University Medical Center. He then completed a Fellowship in Allergy and Clinical Immunology at the National Jewish Center for Immunology and Respiratory Medicine and University of Colorado in Denver, Co.

Dr. Matz is the Director of Chesapeake Clinical Research, Inc which was founded in 1992 and is the instructor in the Department of Medicine at the John Hopkins School of Medicine in addition to working as a physician at Drs. Golden and Matz, LLC. Dr. Matz is a fellow of the American Academy of Allergy, Asthma and Immunology, and the American College of Allergy, Asthma and Immunology. Dr. Matz was born and raised in Baltimore. He is an avid skier and golfer, although his handicap hovers around 12- he keeps trying. He spends most of his free time with his wife and four children.

Dr. Golden graduated from McGill University School of Medicine in 1976, where he also completed his residency in Internal Medicine. He entered a fellowship training program in Allergy-Clinical Immunology at Johns Hopkins University, where he then directed a program of research studies on anaphylaxis and insect sting allergy for 30 years. In 1984, he founded this private practice, which has grown into a large allergy group practice and has been recognized for academic quality and superior patient care. Dr. Golden has published dozens of research papers, and is invited to give lectures at national and international scientific meetings. He is now an Associate Professor of Medicine and a teaching clinician at the Johns Hopkins Asthma and Allergy Center. In addition to developing educational programs for the American Academy of Allergy Asthma and Immunology, Dr. Golden presents an allergy-immunology curriculum for medical residents in teaching community hospitals in Baltimore. Dr. Golden is the Chief of the Allergy Division of Internal Medicine at Franklin Square Hospital, and is the Director of Allergy in the Department of Medicine, Sinai Hospital of Baltimore. He is also the father of 2 grown and successful children and the proud new grandfather of baby Jack.

David B.K. Golden, M.D. Jonathan Matz, M.D

Mary E. Fontana-Penn, M.D.

Dr. Fontana-Penn comes to our practice from Wake Forest University in Winston Salem, NC where she spent six years as an Assistant Professor of Pediatrics and internal Medicine specializing in Allergy, Asthma and Clinical Immunodeficiency. She was associate Program Director for the Allergy and Immunology Fellowship and Director of the Adult and Pediatric Immunodeficiency Clinic. Prior to that, she was Assistant Professor at the Thomas Jefferson University School of Medicine for several years after completing her specialty fellowship training in allergy and immunology. She also spent a year as a fellow in Pediatric Infectious Disease at the Albert Einstein Medical Center. Dr. Fontana-Penn has authored several peer reviewed papers and abstracts. In her spare time, you can find Dr. Fontana-Penn enjoying her two daughters, reading and biking on the NCR trail.  ***WE THANK Dr. Fontana Penn for her devotion to her patients as she moves on.  Dr. Fontana Penn will be leaving at the end of February 2019.***

Mary E. Fontana-Penn, M.D.
Group photo of doctors

Jessica M. Nguyen, M.D.

Dr. Jessica M. Nguyen is a board-certified Allergist & Immunologist. As a Philadelphia native, Dr. Nguyen graduated with High Honors and was elected into the Phi Beta Kappa Honor Society from Haverford College, and then went on to earn her medical degree from the University of Pittsburgh School of Medicine during which time she was selected to complete a Doris Duke Clinical Research Fellowship at Harvard Medical School. Dr. Nguyen completed a Residency in Internal Medicine at the University of Pittsburgh Medical Center, followed by a fellowship in Allergy & Clinical Immunology at the Johns Hopkins School of Medicine during which time she was involved in asthma clinical trials research through the American Lung Association and was selected to receive a Fellow-In-Training Award for Health Outcomes, Education, Delivery and Quality from the American Academy of Allergy, Asthma and Immunology.  She is a member of the Maryland Asthma & Allergy Society; the American College of Allergy, Asthma & Immunology; and the American Academy of Allergy, Asthma & Immunology.  Dr. Nguyen delivers humanistic & compassionate care to both her pediatric and adult patients, and has experience in treating a wide span of allergy conditions including asthma, allergic rhinitis (hay fever), eczema, food allergies,  urticaria & angioedema (hives & swelling), drug allergies, insect allergies, & immunodeficiencies. In her free time, Dr. Nguyen enjoys spending time with her husband & family traveling, cooking & being active outdoors.