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Quest Diagnostics Fax Number — Lab Orders, Requisitions, and Results

Quest Diagnostics runs a national network of laboratories and patient service centers, and fax handling depends on the local lab and the provider account tied to the order. Test orders reach Quest on a requisition, and results are faxed back to the ordering provider at the fax number set up on that clinician's Quest account, not through one public line. If you need records, a corrected order, or a standing-order update, the right fax comes from the specific Quest lab handling the specimen or from Quest client services for your account. Patients requesting their own results typically go through the MyQuest portal or the Quest records process rather than a fax.

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Quest Diagnostics Fax Number

Contact the ordering Quest Diagnostics lab or client services for its records fax line

Hours: Quest laboratory operations and client services generally run extended weekday hours, and many labs process specimens beyond standard business hours; faxes are queued around the clock and worked during operating shifts.

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What You Can Fax to Quest Diagnostics

  • Test order requisitions
  • Standing and recurring order authorizations
  • Corrected or add-on test requests
  • Clinical notes supporting medical necessity
  • Records or result-copy requests for the ordering provider
Tip: Confirm the ordering provider's result-delivery fax is current on the Quest account before relying on it, because results route to the number the clinician registered, not to whoever sends the order. Lab data is protected health information, so use a HIPAA-eligible service such as Send FAX Mail's Business plan ($79.99/month) and keep the delivery receipt with the order. Put the patient's name, date of birth, and the ordering provider on the requisition.

Faxing to Quest Diagnostics — FAQ

Results are sent to the fax number configured on the ordering clinician's Quest account, which is set up when the provider establishes their account and can be updated through client services. If your results aren't arriving, verify that registered fax rather than assuming a general Quest line.

A signed requisition normally accompanies the specimen to the lab or patient service center, and faxing may be used for add-on tests, corrections, or standing-order updates. Confirm with the local Quest lab or client services how it wants order documents submitted for your account.

Standing-order changes go to the Quest lab or client services managing that provider account, which supplies the correct fax for order documentation. Include the patient identifiers and the ordering provider so the update attaches to the right recurring order.

Patients most often view results through the MyQuest online portal or request records copies through Quest's patient process rather than by fax. The faxed-result path is generally for delivering to the ordering provider, not directly to the patient.

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