Location & Phone

Camalier Building                                 Directions
10215 Fernwood Road
Suite #520
Bethesda, Maryland 20817

Office Website

Communication Preferences

For routine matters, the preferred methods of communication are phone, encrypted messaging, or encrypted email.

For encrypted messaging, Dr. Horn uses Signal which is an app that may be used on your phone or computer.

To start an encrypted email exchange, use this secure form.

Unencrypted email and standard texting are not secure and should not be used for sending private health information.

Messages are typically check Monday through Friday at 11:00 and 4:00.

Signal download links
You will find Dr. Horn on Signal by his phone number, 240-242-9856.

Phone Numbers

Main Telephone:
Emergency:
Main Fax:
Business Office:

240-242-9856 or 888-406-4560 #2
888-406-4560 #1
301-897-8537
301-897-0099

After Hours Phone Calls

When the office is closed, you may call the main telephone number to leave a message for Dr. Horn which he will return during the next business day, or for urgent matters, call 888-406-4560 and press option 1 to reach Dr. Horn directly. In an emergency, you should call 911 or go to the nearest emergency room.