An external laboratory request is cancelled after it was sent

A clinician changes a request after staff have already sent it to an external laboratory. Preserve the original request and record the authorised change. A new instruction at the hospital does not establish that the laboratory has received or acted on it.

The clinical team decides whether and how the request should change. This guide covers the administrative communication and tracking around that decision. It sets no specimen-handling instructions or clinical deadline.

Establish the authorised instruction

Identify the original request, its patient and attendance references, and the clinician responsible for the change. Record the instruction through the hospital's approved record process, including its date and author. Reception should not cancel a request because a billing discussion or a patient's departure appears to make it unnecessary.

Clarify exactly which part changes. A request containing several items may be amended in part. An instruction saying cancel the bloods is too ambiguous for an administrative colleague to translate into specific laboratory action without clarification from the responsible clinician.

Contact the laboratory through the agreed route

Use the current authorised directory and the original request reference. Record who was contacted, when and the response. A message sent remains a communication attempt until the receiving party's outcome is established through the approved procedure.

Ask the laboratory to confirm the administrative status of the affected request. Work may already have progressed, and a late instruction can raise questions the hospital and laboratory must resolve. Refer clinical or specimen questions to the appropriate professionals rather than trying to answer them from the tracking sheet.

The WHO laboratory handbook is background for retaining referral records. It does not define the cancellation terms of a particular laboratory.

Retain the unresolved consequences

Update the external referral tracker with the instruction and communication references. Keep an unresolved acknowledgement assigned to a named person. If a report subsequently arrives, preserve it and route it through the clinical team; do not discard it because the local request status says cancelled.

Any billing implication needs its own authorised review. Cancelling the clinical request does not automatically establish that a charge should be removed or money refunded. Link that question to the billing query log and leave the original request history available to the staff resolving it.