Customer story

Lumen Health

·

Clinical summaries

212 regressions blocked before release in Q3

11 min median triage

3 judges calibrated

94% judge agreement

Regressions blocked per week · Q3

212

The challenge

Lumen writes visit summaries for clinicians. Every summary was reviewed by hand, and review time was the release bottleneck.

The setup

Three judges (omissions, dosage, tone) were calibrated against clinician labels, with disagreements routed to a human review queue.

The result

In Q3 the gate blocked 212 regressions before release, median triage fell to 11 minutes, and clinicians now review a 40-case sample each week.

Our clinicians review 40 cases a week instead of 400. The judges agree with them 94% of the time.

Priya Raman

Priya Raman

ML Lead

Catch

AI

regressions

before

your

users

do.

Start with 240 of your own cases. 14 days free, no credit card.

Catch

AI

regressions

before

your

users

do.

Start with 240 of your own cases. 14 days free, no credit card.

Catch

AI

regressions

before

your

users

do.

Start with 240 of your own cases. 14 days free, no credit card.

Holdout

Get the monthly changelog

1,400+ AI teams ship with Holdout.

© 2026 Holdout Labs, Inc.

All systems normal

Holdout

Get the monthly changelog

1,400+ AI teams ship with Holdout.

© 2026 Holdout Labs, Inc.

All systems normal

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