Do Send-Out Tests Need Separate Lab Liability Insurance?

Yes. When your lab sends specimens to a reference laboratory, you do not transfer your liability to that lab. You retain exposure for the results that come back, and your standard professional liability policy may not cover it the way you think.

This is one of the most consistent coverage gaps in clinical lab programs. The assumption is that the reference lab’s errors are the reference lab’s problem. The operational and legal reality is more complicated.

Why Sending a Specimen Does Not Transfer the Liability

When a patient’s specimen leaves your facility and goes to a reference lab, your relationship with that patient does not leave with it. You remain the ordering entity from the patient’s perspective. You selected the reference lab. You received the result. You released it to the ordering provider. A reference relationship often requires you to add the partner as an additional insured, explained in what an additional insured endorsement is and when your lab needs one. When the reference relationship crosses a border, the policy territory and governing-law questions enter the picture, covered in what insurance a lab needs to process international specimens.

Plaintiff counsel in diagnostic error cases names everyone in that chain. If a result came back incorrect from the reference lab, you carry residual exposure for:

• Selecting a reference laboratory that lacked the accreditation or quality controls appropriate to the test
• Transcription errors when integrating the reference lab’s result into your LIS or reporting it to the ordering provider
• Delays in transmitting the result that produced a missed clinical window
• Acting on a result without flagging an anomaly that should have triggered a rerun or inquiry

The reference lab’s professional liability policy responds to its own errors. Your professional liability policy is what responds to your role in the transaction. Those are two different policies covering two different parties.

What Your E&O Policy May and May Not Cover

Laboratory E&O policies address claims arising from errors or omissions in the lab’s professional services. The question is whether “professional services” in your policy’s wording extends to the send-out workflow specifically.

Some forms do this clearly. Others define professional services in ways that were designed for testing performed in-house, and the wording can create ambiguity about whether the lab’s role in selecting, transmitting to, and receiving results from a reference lab constitutes a covered professional service.

Three specific areas to review in your current policy:

• Does the policy’s definition of professional services include specimen referral and result integration?
• Does the policy cover claims arising from a reference lab’s error where your lab is named as a co-defendant based on the selection relationship?
• Does the policy include contractual liability coverage for indemnification obligations you owe the reference lab under your service agreement, or vice versa?

If your broker cannot walk through all three against your actual policy form, that gap in knowledge is itself a signal worth taking seriously. A certificate alone is not enough to verify a reference partner’s coverage, covered in what a certificate of insurance is and what your lab should check.

The Contractual Layer Matters Too

Most reference lab relationships operate under a service agreement with indemnification language. The structure of that language determines which party is responsible for which type of error and which party’s insurance responds first.

The problem is that indemnification agreements often do not match the actual policy wording on both sides. A referring lab that agrees contractually to indemnify the reference lab for its own errors needs to confirm that its professional liability policy actually covers that indemnification obligation. Many standard E&O forms exclude or sub-limit contractual liability.

When both sides have been placed by brokers who did not coordinate the indemnification language against the policy wording, gaps appear at claim that neither party anticipated. Those agreements also carry indemnities your policy has to back, covered in what an indemnification clause means for your lab insurance program.

What a Send-Out Program Actually Needs

If your lab regularly sends specimens to one or more reference laboratories, the professional liability component of your program should address:

• In-house testing errors (standard E&O)
• Send-out test liability for your role in selection, transmission, and result integration
• Contractual indemnification flowing between you and the reference lab
• Any delay or communication failures on results coming back from the reference lab that you are responsible for communicating to the ordering provider

This is not necessarily a separate policy. It is often a wording review of your current E&O form and, where the wording is inadequate, either an endorsement or a move to a form designed for labs that operate with reference lab relationships.

The volume and complexity of your send-out panel matters. A lab that refers two or three specialized tests per month has a different exposure profile than a lab whose core business model includes systematic referral of molecular, genetic, or esoteric testing to multiple reference partners.

If you are in the second category and your professional liability was placed without a specific conversation about send-out volume and reference lab structure, a coverage review is the practical next step. Tower Street Insurance works with labs across this specific exposure profile through specialty markets that underwrite the reference lab relationship as a distinct underwriting factor, not an assumption.