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Pathology and Laboratory Medicine

Contact number | 202-476-2226

Diagnostics and disease monitoring is the cornerstone of modern medicine. All inpatient and outpatient medical and surgical care depends on access to advanced diagnostics as well as having the ability to monitor disease over time. Many aspects of pediatric diagnostic medicine are affected by the unique aspects of caring for children.

Our specialists perform vital diagnostic, therapeutic and blood collection services for all patients at our hospital, as well as at our specialty care locations and mobile health units in the Washington, D.C., metropolitan area. Using state-of-the-art technologies and techniques, our team completes more than 1,000,000 tests annually to assist physicians in confirming a diagnosis or in monitoring the effectiveness of a child’s treatment.

Anatomic Pathology Service

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.

Blood Draw Service

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. 

Main Hospital

Address: 111 Michigan Ave. NW, Washington, DC 20010
Phone Number: 202-476-5915
Hours of Operation: Monday-Friday: 8 a.m. - 6 p.m.; Saturday: 10 a.m. - 2 p.m.
All blood draws are walk-in.
Sweat testing requires an appointment. Contact 202-476-2226

Friendship Heights Regional Outpatient Center

Address: 5028 Wisconsin Ave. NW, Suite 250, Washington, DC 20016
Phone Number: 202-895-3860
Hours of Operation: Monday-Friday 8 a.m. - 4 p.m.

Montgomery County Regional Outpatient Center

Address: 9850 Key West Ave., Suite 300, Rockville, MD 20850
Phone Number: 301-765-5789
Hours of Operation: Monday-Friday 8 a.m. - 5 p.m.

Prince George's County Regional Outpatient Center

Address: 2900 N. Campus Way, Suite 103, Lanham, MD 20706
Phone Number: 301-276-9100
Hours of Operation: Monday-Friday 8 a.m. - 5 p.m.

Howard County Regional Outpatient Center

Address: 7625 Maple Lawn Blvd., Suite 230, Fulton, MD 20759
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.

Annapolis Regional Outpatient Center

Address: 1730 West Street, 1st Floor, Suite 100, Annapolis, MD 21401
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.

Please note: You can also pick up collection kits or drop off specimens of urine or stool at any of these locations.

The Blood Donor Center

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. 

Additional Laboratory Services

  • Bedside testing: for rapid test results for our most critically ill patients
  • Biochemical testing: for diagnosis and monitoring of inborn errors of metabolism
  • Blood bank: for providing blood and other products for transfusion
  • Flow cytometry: characterizes different types of blood cells for diagnosis of immunodeficiency or leukemia
  • Hematology
  • Hematopathology: for diagnosis of leukemia and lymphoma
  • Microbiology testing: for employing conventional culture, detection of antimicrobial resistance & molecular infectious disease tests
  • Molecular diagnostics: for diagnosis of genetic diseases and cancer
  • Reference laboratory services for rare diseases
  • Sweat testing: we are a Cystic Fibrosis Foundation-accredited site
  • Testing for organ systems and disease categories: allergy, endocrine, cardiac, gastrointestinal, muscular, neurological, hepatic, pulmonary, autoimmune/immunology, malignant, renal, etc.
  • Therapeutic medication monitoring
  • Transfusion medicine consultation
  • Transplant-related testing

Contact Us

To speak with a member of the Pathology team, please call 202-476-2051. To speak with a member of the Laboratory Medicine team, please call 202-476-2226. See more contact information.

Pathology and Laboratory Medicine Team