Use this guide alongside the instructions provided by your Meridian care team. Preparation varies by test.
PATIENT GUIDE · MERIDIAN LABS
Use this guide alongside the instructions provided by your Meridian care team. Preparation varies by test.

Laboratory tests are ordered by your clinician. Confirm the test, location, and timing in your appointment information before your visit.
Ask the front desk whether your test requires an appointment and which Meridian location to visit. Availability varies by location.
Fast only if your clinician directs you to. Some tests require fasting and others do not. Do not stop or change medications unless your clinician specifically instructs you to do so.
If your test requires a specimen collected at home or special timing, follow the instructions provided for that test.
Some laboratory work may be processed by an outside laboratory, which may send a separate bill. See the Financial & Billing Guide.
Results are sent to your ordering clinician, who will explain how results are shared and whether follow-up is needed.
Contact Meridian to confirm your order, location, and preparation instructions.

Connected primary care, specialty care, behavioral health, labs and imaging across Maryland.
© 2026 Meridian Medical Group. All rights reserved.