Blog

What we’ve learned transforming employer benefits data.

Practical writing on eligibility files, 834s, claims ingestion, identity resolution, and the January 1 crunch, from the team that built Data Nexus.

Introducing Data Xpert

Jason Cole, CTO

November 9, 2026

A self-service upload tool that makes small employers affordable for benefits providers to serve.

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The Game of Risk

Jason Cole, CTO

October 26, 2026

Risk is the heaviest piece of the ownership cost, and it stays the same size no matter how fast you build.

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Vibing With Data: What Could Go Wrong?

Jason Cole, CTO

July 8, 2026

Thanks to AI, when new data sources show up, feeds are live a few hours later. But that speed is possible because...

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Take What You're Given: Benefits Data Interoperability

Jason Cole, CTO

June 16, 2026

How Dart solves benefits data interoperability with an architecture that expects chaos. Powered by AI. Read on.

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Jen Can Never Leave

Jason Cole, CTO

May 19, 2026

Jen had been at the company longer than nearly anyone. She knew how everything worked, and more importantly what didn't.

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Identity Resolution: Twins and Little Bobby Tables

Jason Cole, CTO

May 5, 2026

In a 150,000-member eligibility file, the Data Nexus caught an anomaly: two members with the same full name and birthday

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Starting With “Yes”

Jason Cole, CTO

April 16, 2026

In a meeting with one of the largest employers in the United States, our client had a surprise for everyone, "...

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"Just a Sprint"

Jason Cole, CTO

March 31, 2026

Halfway through the meeting, the PM asks the engineer for an estimate. They reply, “No problem, it's just a sprint"...

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The Q4 Crunch

Jason Cole, CTO

March 17, 2026

If you work in employer health and benefits, you know the Q4 Crunch. And preparing to go live starts in late summer...

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Solutions Specifically for Group Health and Benefits

Dart Health handles and accelerates data connections for health and benefits companies with employer sponsored healthcare. These are just a few service highlights.

Onboard a new employer's eligibility file in under 7 days

Onboard a new employer's eligibility file in under 7 days. The employer sends the file it already has. We validate every record, and you read one JSON API.

What happens when an eligibility file is wrong

Data Nexus checks every eligibility record against the last file and stops what doesn't fit. A person on Dart's team decides each exception.

Match the same member across eligibility, claims, and program files without a shared ID

Data Nexus resolves each member, dependents included, across eligibility, claims, and program files with no shared ID. Over 99% on 3M records a month.

Handle retro terms, back-dated enrollments, and corrected claims without losing history

When an employer back-dates a termination or a carrier corrects a claim, keep both versions of the record and the date each one arrived.

Send each partner its own feed, limited to the data it needs

Data Nexus builds each partner's feed from one unified member record, with only the fields that partner needs, delivered on that partner's schedule.

Build vs. buy: eligibility data ingestion for digital health companies

Should a digital health company build its own eligibility pipeline? Compare the parser's cost with the cost of owning the pipeline, and see when to build.

Dart vs. OneSchema vs. Integrate.io vs. Flatfile vs. building in-house for employer eligibility files

Data Nexus by Dart Health, OneSchema, Integrate.io, Flatfile, or building in-house: who runs eligibility feeds, who fixes bad files, and what each costs.

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