The queries worth owning have a neighborhood attached to them
In a city this dense, the neighborhood term is the one that books, and the metro term is the one that flatters.
A patient in Columbia Heights types the neighborhood. So does a patient in Shaw, on Capitol Hill, or near Navy Yard. The metro-level phrase pulls in national directories and offices with budgets you will not outspend, and most of the traffic it sends is too far away to sit in your chair.
Pick the three or four submarkets you actually draw from. Give each one a page with real content on it: the cross streets, the buildings and blocks you serve, what parking is like there, which providers work which days, the plans you commonly see from patients in that area.
Location pages that swap a place name into an identical template are obvious to anyone reading them, search engines included. One good page beats eight cloned ones.
There is a second use for these pages. The front desk can send them. A caller weighing you against a practice six blocks away will pick whichever page answers the practical question first.