Diagnosis of diseases from tissue biopsies and bodily fluids is done at the main hospital on the first floor Monday-Friday from 8 a.m. - 5 p.m. For more information, please call 202-476-2051. If it is after business hours or the weekend, please call 202-259-0784.
An integral part of Pathology and Laboratory Medicine is The Blood Donor Center, which collects thousands of whole blood and apheresis platelet donations that support the more than 13,000 life-saving and life-enhancing procedures performed each year to help Children’s National patients.
Learn more about becoming a volunteer blood donor.
Children's National Hospital has several locations in DC and Maryland, making it easy and convenient for you to have your blood work collected by our pediatric-trained staff. We understand that having blood drawn can be stressful for our special needs patients. We provide phlebotomy expertise, compassion and distraction techniques to make the experience as positive as possible.
For more information about our blood draw services after business hours, contact 202-476-2226.
Phone Number: 202-476-5915
Hours of Operation: Monday, Wednesday-Friday: 8 a.m. - 6 p.m.; Tuesday: 7 a.m. - 6 p.m.; Saturday: 8 a.m. - 2 p.m.
The lab will be closed for the following holidays:
All blood draws are walk-in.
Sweat testing requires an appointment. Contact 202-476-2226
Phone Number: 410-266-6582
Hours of Operation: Monday- Friday 8 a.m. - 3:30 p.m. *Due to limited space, please call ahead to prevent long wait times.
Phone Number: 202-895-3860
Hours of Operation: Monday-Friday 8 a.m. - 4 p.m.
Phone Number: 301-847-2900
Hours of Operation: Monday-Friday 8 a.m. - 3:30 p.m. *Due to limited space, please call ahead to prevent long wait times.
Phone Number: 301-765-5590
Hours of Operation: Monday-Friday 7 a.m. - 5 p.m.
Phone Number: 301-276-9189
Hours of Operation: Monday-Friday 7 a.m. - 5 p.m.
Please note: You can also pick up collection kits or drop off specimens of urine or stool at any of these locations.
Sweat testing requires an appointment. Contact the Laboratory at 202-476-2226 Monday through Friday between 9:30 a.m. – 6 p.m. Slots are available at 10 a.m. or 11:30 a.m. on weekdays (not available on weekends and holidays).