Pathology and Laboratory Medicine

About Us:

GBMC's Diagnostic Center provides specimen collection services for diagnostic lab testing, blood donation to oneself for surgery or therapeutic purposes, and electrocardiographs.


Diagnostic Center, GBMC Main Hospital

Hours of Operation
Monday - Friday: 6:00 a.m. - 6:00 p.m.
Saturday: 8:00 a.m. - Noon
Sunday: Closed
Holidays: Closed except open on Good Friday

Please Note: EKGs are performed Monday - Friday from 6:00 a.m. - 6:00 p.m.

Appointments are required for Autologous (to oneself) / Therapeutic blood donors. Please call 443-849-2817 to schedule an appointment at the Diagnostic Center.

Patient Satisfaction:Patients who have visited the Diagnostic Center may receive a Press Ganey Patient Satisfaction survey in the mail. These surveys give us helpful insight about how we can ensure a very good experience for our patients.

If you have any comments or concerns, please contact Lois Lorenz, Manager, Specimen Collection/Client Services by phone at 443-849-2091 or by e-mail at

3rd Floor, down the hall from Main Lobby B, Suite 3100    
Phone: 443-849-2213

Greater Baltimore Medical Center | 6701 North Charles Street | Baltimore, MD 21204 | (443) 849-2000 | TTY (800) 735-2258
© 2017  GBMC. This website is for informational purposes only and not intended as medical advice or a substitute for a consultation with a professional healthcare provider.