GET STARTED AT ROCKVILLE CONCIERGE DOCTORS. Becoming a member of our concierge practice is an investment in your health and well-being. If you think you may be interested in becoming our patient, please call (301) 545-1811 or use the form on this page. Dr. Seidman is currently accepting new patients.. During this one-on-one consultation, you will meet with Dr. Seidman for an hour to get ....