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Test Directory
Submitting Specimens to CDC
CDC laboratories are in the process of returning to full operations following recent events at the Roybal campus. Essential testing, including CLIA reference laboratory services for critical specimens, will continue, though some tests may be delayed. For inquiries, please email CDC_ID_lab_info@cdc.gov. Thank you for your understanding.
Several test orders are currently unavailable. Please click “More Info” for the full list.
CDC’s Infectious Diseases Laboratories accepts specimens from state public health laboratories and other federal agencies for analysis. Specimens from private healthcare providers and institutions should be submitted to the local state health department laboratory (state, county, city) for appropriate processing. The searchable Test Directory features an up-to-date list of orderable tests and provides information on specimen requirements, contact information, test turnaround times, and other supplemental information. Access the directory here or while completing a Specimen Submission Form.
You may also download a copy [PDF – 587 pages] of the entire Test Directory.
Effective July 28, 2025, an updated directory is available. View the list of major changes from the last update here [PDF – 22 pages].
Specimens submitted for testing must be accompanied by CDC Form 50.34.