FDA finalizes human factors guidance and sorts every submission into one of three categories

MedDevice Startups Staff · May 29 · 2 min read · Via Federal Register notice

FDA finalized the human factors content guidance on May 29, 2026 under Docket FDA-2015-D-4599, three and a half years after the December 9, 2022 draft. It supersedes the 2016 draft list of highest priority devices for human factors review and sits alongside the older guidance on applying human factors and usability engineering.

The framework is a flowchart ending in one of three categories. Category 1, available only for modified devices, asks for a conclusion and a high-level summary. Category 2 asks for a rationale that the device has no critical tasks, or that none are newly affected. Category 3 asks for the full human factors engineering report with validation testing. The final version added a fourth decision point covering whether validation data must be submitted, weighing user interface history, complexity and existing risk controls.

FDA said it does not expect the newly recommended content in submissions received before August 1, 2026, and eSTAR 7.0 shipped June 1 with a drop-down for HF Submission Category 1, 2, 3 or Guide Me. That drop-down is the practical change. Human factors is now a labelled field in every review rather than a section reviewers reach at the end, and picking Category 2 obliges a startup to defend a no-critical-tasks argument it may never have written down.

Questions & Answers

What are the three human factors submission categories in FDA's 2026 guidance?

Category 1 applies to modified devices and asks only for a conclusion and high-level summary of the HF evaluation. Category 2 requires a rationale showing there are no critical tasks or no newly impacted critical tasks. Category 3 requires a full human factors engineering report including HF validation testing.

When does FDA's human factors content guidance take effect for submissions?

FDA issued the guidance May 29, 2026 under Docket FDA-2015-D-4599 and said it does not expect manufacturers to include the newly recommended information in submissions received before August 1, 2026. eSTAR versions 7.0 carry the matching content from that date.

Does the 2026 human factors guidance replace the 2016 FDA human factors guidance?

It supersedes the February 2016 draft List of Highest Priority Devices for Human Factors Review and complements, rather than replaces, the existing guidance on applying human factors and usability engineering to medical devices.

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