Division of Molecular Pathology

Molecular Diagnostics Laboratory

The Molecular Diagnostics Laboratory is CAP and CLIA-certified and is licensed in Maryland, Pennsylvania, and Florida. The lab is not licensed to accept specimens from New York.

Shipping Address

Johns Hopkins Genomics - MDL
1812 Ashland Avenue
Room 245
Baltimore, MD 21205


The lab is not able to accept deliveries on Saturdays or the following holidays (or observed holidays): New Year's Day, MLK Jr Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, Christmas Day.

Specimen Requirements

Please see the Test Menu for specimen requirements for specific tests.

Blood and Bone Marrow

A. For AR-V7 testing, blood must be collected in yellow top ACD-A tubes. Specimens must be received within 24 hours of collection, or they will be rejected. See AR-V7 Requisition Form for detailed specimen requirements and shipping instructions.

B. For Telomere Flow FISH, keep specimens at room temperature, and ship overnight. Specimen requirements are:

C. For all other tests, lavender top EDTA tubes are preferred. Refrigerate and ship overnight with cold pack. Do not freeze.

FFPE Tissue

Buccal Swabs