Data Nexus by Dart Health keeps an auditable history of every feed, including what a record says now and what it said on any date in your lookback window. When an employer back-dates a termination or a carrier corrects a claim, you keep both versions and the date each one arrived. Lookback depends on plan: 6 months on Starter, 6 to 12 months on Pro, and unlimited on Enterprise.
Most eligibility pipelines treat each file as the new truth and overwrite the last one. That works until an employer terminates a member retroactively or a carrier corrects a claim from two months ago. It also breaks when a client changes how it segments its population.
After that, your team can't say who was covered on the date you billed, or why last quarter's numbers changed.
Reconstructing it later means digging through old files by hand, if they were kept at all.
For example: on March 3, an eligibility file arrives with member 33-118 covered, effective January 1. On March 17, a new file terminates that coverage, back-dated to March 1.
Ask what was known on March 10 and the answer is covered. Ask what's known today and the answer is terminated as of March 1. Data Nexus keeps both answers, each with the date it arrived.
History and identity resolution share the same record, and identity resolution runs above 99% across about 3 million records a month.
No. The earlier version stays. We record the termination alongside it, with the date it arrived and its effective date.
Yes, for any date inside your plan's lookback window.
Records received before the change keep the segment values they arrived with. Records after the change carry the new values and their arrival dates, so you can compare the two periods on the same members.
6 months on Starter, 6 to 12 months on Pro, and unlimited on Enterprise. The window is configurable within those ranges.
We'll show how it looks in Data Nexus, on a 30-minute call.
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