Dr. Dirick Johnson and Dr. Svetlana Kriegel are board-certified allergists and immunologists. They have two offices – one in Woodbridge and the other in Fairfax – to better serve the communities of northern Virginia. With an array of treatments, the specialized staff offers: environment testing, inhalant testing, oral food challenge, patch testing, drug allergy evaluation and testing, beathing testing and allergy injections. Call to schedule an evaluation.