Dentist in NW Washington, DC

Foxhall Square | 3301 New Mexico Ave NW, Suite 332 | Private garage and valet on site

Slate Dental is a dentist in NW Washington, DC, on the third floor of Foxhall Square, at the corner of New Mexico Avenue and Nebraska Avenue NW. Dr. John Slate, DMD sees one patient at a time. There is no second operatory running in parallel and no lobby full of people waiting.

If you are looking for a dentist near you in Northwest DC, everything you need to decide is on this page: where we are, how to park, when we are open, what a first visit involves, and what it costs.

The office

Third floor of Foxhall Square, Suite 332. Small, quiet, and built for one patient at a time.

Your dentist

Dr. John Slate, DMD, voted Washingtonian Top Dentist by his peers in 2021, 2023 and 2025.

Where you will be seen

No second operatory running in parallel, no double-booking, and no handing you off partway through.

Where We Are in Northwest DC

We are at 3301 New Mexico Avenue NW, Suite 332, in the Foxhall Square building. If you know the area, you know the building: Wagshal’s is next door and Chef Geoff’s is on the corner. We are directly across from Mann Elementary School, one block south of American University, and a few minutes from the National Cathedral. Wesley Heights is across the street.

Our entrance is on the third floor. There is a concierge desk and a building directory inside the main lobby, and an elevator to our floor. Get directions.

Parking Is the Easy Part

Parking in this part of DC is usually the thing people worry about. At Foxhall Square it is genuinely straightforward, and you have three options.

Find the building

3301 New Mexico Avenue NW, across from Mann Elementary and one block south of American University. The main entrances are on the east and south sides.

Turn in

The garage entrance is on the south side of the building. Look for the 3301 Foxhall Square Parking sign and turn into the driveway.

Park or valet

A private covered garage for the building, operated by Colonial Parking, with valet available. Free two to three hour street parking is also available on New Mexico Avenue and in Wesley Heights across the street.

Or get dropped off

A covered roundabout serves as a drop-off, which helps in bad weather, for rideshare arrivals, and for wheelchair access. Elevator to the third floor, Suite 332.

Hours

The 7:30 AM start exists for a reason. A good share of our patients work in the area and come in before the day starts.

Neighborhoods We Serve

Most of our patients come from Foxhall, Wesley Heights, Spring Valley, American University Park, Cathedral Heights, The Palisades, and Georgetown. We also see patients from Bethesda, Chevy Chase, and McLean, and a number of people who live elsewhere but work near the office and find it easier to see a dentist on their side of the commute.

What a First Visit Actually Involves

We reserve 60 to 90 minutes for a new patient exam. That is not a sales meeting and it is not a rushed look with a cleaning bolted onto the end. It is the time it takes to do this properly.

• We take a full history, including what has been done before and what you did not like about it.
• We take digital images and a full set of records, and examine the teeth, gums, bite, and jaw joints together rather than one tooth at a time.
• We talk through what we found, in plain language, and what your options are, including doing nothing for now where that is reasonable.
• You get any fees in writing before treatment is scheduled.

If a cleaning is appropriate at that visit, we will say so. If your gums need something different from a routine cleaning, we will explain why rather than doing the routine one anyway. More on that on our new patient page.

Fees and Insurance

Slate Dental is a fee-for-service practice. Most of our patients do not use dental insurance, and that is not a problem here. It is a normal way to be seen by us. Every fee is quoted in writing before treatment begins, and there are no surprises added afterward.

We are in-network with Cigna DPPO and PPO plans. If you carry another plan, we are happy to provide the documentation you need to submit for your own reimbursement. Details are on our payment and insurance page.

Adults and Teens

We treat adults and teenagers. We do not offer pediatric dentistry, braces, or clear aligners. If you are looking for a dentist for a young child, or for orthodontics, we would rather tell you that now than have you drive here to find out, and we are glad to point you toward someone good.

Questions People Ask Before Booking

Where exactly are you?

3301 New Mexico Avenue NW, Suite 332, Washington, DC 20016, in the Foxhall Square building, third floor. Wagshal’s is next door and Chef Geoff’s is on the corner.

Is parking difficult?

No. The building has its own private covered garage, operated by Colonial Parking, with valet available, plus free two to three hour street parking on New Mexico Avenue and in Wesley Heights. A covered roundabout at the entrance works as a drop-off.

What are your hours?

Monday through Thursday, 7:30 AM to 4:00 PM, and Friday 7:30 AM to 12:30 PM. We are closed on weekends.

Do you take my insurance?

We are in-network with Cigna DPPO and PPO plans. We are otherwise a fee-for-service practice, and most of our patients do not use dental insurance at all. Fees are quoted in writing before treatment.

Are you taking new patients?

Yes. Call (202) 686-5222 during office hours, or book online and we will confirm by phone.

Do you see children?

We treat adults and teenagers. We do not offer pediatric dentistry, braces, or clear aligners.