From coronavirus.dc.gov/testing:
“CDC/FEMA/ETruNorth Operated PCR Testing Site
Beginning Wednesday, January 5 at 1:00 p.m., a new COVID-19 PCR testing site will be provided in partnership with The Centers for Disease Control (CDC), Federal Emergency Management (FEMA), and eTrueNorth.
The testing site will be located at F St. NW, between 4th and 5th St – across from the National Building Museum.
The site will operate from 8:00 a.m. to 6:00 p.m., seven days a week.
Individuals can register here iNeedaCOVID19Test.com to create a unique digital voucher to take with them during their appointment.
Individuals can also register onsite or call 1-800-635-8611 for assistance.”