Choosing a Medical Device Testing Laboratory: Why ISO/IEC 17025 Accreditation Matters, Blog Post by David Abiola

September 14, 2026

Choosing a Medical Device Testing Laboratory: Why ISO/IEC 17025 Accreditation Matters

Blog post by David Abiola, Summer 2026 Intern, SteriLabs

Medical device development depends on data. A passing test result is only valuable when there is confidence in how that result was generated.

Whether testing is being used to support product development, validation, quality decisions, or regulatory documentation, manufacturers need confidence that the laboratory performing the work has competent personnel, appropriate methods, controlled equipment, and a robust quality system.

ISO/IEC 17025 provides an internationally recognized framework for demonstrating that competence.

What Is ISO/IEC 17025?

ISO/IEC 17025 is the international standard that specifies requirements for the competence, impartiality, and consistent operation of testing and calibration laboratories.

Its requirements address areas such as personnel competence, equipment, method selection and control, metrological traceability, technical records, quality assurance, and the validity of laboratory results.

For medical device manufacturers, working with an ISO/IEC 17025-accredited laboratory provides additional assurance that the laboratory has been independently assessed against recognized requirements for laboratory competence.

Accreditation Is Specific to a Laboratory’s Scope

An important point that can sometimes be overlooked is that ISO/IEC 17025 accreditation is not simply a blanket certification covering every service a laboratory offers.

Accreditation is granted for a defined scope of testing activities and methods. A laboratory may perform services that are within its accredited scope as well as other services that fall outside that scope.

When selecting a testing partner, manufacturers should therefore look beyond whether a laboratory is “ISO/IEC 17025 accredited” and review its current scope of accreditation to determine whether the relevant testing method or capability is included.

This distinction can be especially important when laboratory data will support validation activities, technical documentation, or regulatory submissions.

How Does Accreditation Support Reliable Test Results?

Laboratory testing depends on more than simply following a test procedure. The reliability of the result can also be affected by the equipment being used, the competence of the analyst, the suitability of the method, environmental conditions, documentation, and the laboratory’s ability to identify and address problems.

Calibration and Measurement Traceability

Laboratory equipment can directly influence test outcomes. ISO/IEC 17025 requires laboratories to appropriately control, maintain, and calibrate equipment where required.

The standard also addresses metrological traceability, helping ensure that measurement results can be related to appropriate references through a documented and unbroken chain of calibrations where applicable.

These controls increase confidence that measurements are accurate, consistent, and technically defensible.

Quality Assurance and Method Control

ISO/IEC 17025 also establishes requirements related to the selection, verification, and validation of test methods as appropriate.

Laboratories must maintain technical records, monitor the validity of results, control equipment, ensure personnel competence, address nonconforming work, implement corrective actions, and conduct internal audits and management reviews.

Together, these controls help laboratories identify issues that could affect the reliability of test results before those results are used to make important product or validation decisions.

Why Does This Matter to Medical Device Manufacturers?

Choosing a laboratory should involve more than confirming that it can perform a particular test or comparing the price of one laboratory against another.

Manufacturers should also consider whether the laboratory has qualified personnel, appropriate equipment, controlled processes, suitable methods, adequate documentation, and a quality system capable of consistently producing reliable results.

Improperly controlled equipment, an unsuitable or poorly executed test method, or incomplete technical records can reduce confidence in a study. In some cases, this may lead to repeat testing, additional costs, project delays, or questions about whether the data is suitable for its intended purpose.

Reliable laboratory data supports better decisions throughout medical device development, validation, and quality assessment.

How SteriLabs Approaches Medical Device Testing

At SteriLabs, ISO/IEC 17025 accreditation is part of a broader approach to generating technically defensible medical-device testing data.

Our team works with manufacturers to understand the device, its intended use, the applicable standards, and the purpose of the study before testing begins. This is particularly important for validation work, where selecting an appropriate method, identifying meaningful acceptance criteria, and documenting the study correctly can be just as important as performing the laboratory test itself.

SteriLabs is an ISO/IEC 17025-accredited medical device testing laboratory supporting manufacturers across areas including sterilization and reprocessing validation, microbiological testing, analytical testing, and related testing strategies.

When selecting a laboratory partner, manufacturers should consider not only whether a test can be performed, but whether the laboratory has the competence, controls, experience, and accredited scope needed to generate data they can rely on.

Planning a medical device testing or validation project? Contact SteriLabs to discuss your testing needs and determine an appropriate testing strategy for your device.

References

International Organization for Standardization. ISO/IEC 17025:2017 — General requirements for the competence of testing and calibration laboratories.

International Laboratory Accreditation Cooperation (ILAC). Laboratory Accreditation and the ILAC Mutual Recognition Arrangement.