Health Samurai Blog

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May 22, 2026

15 min read

Designing $unmerge: Reversing the FHIR Patient Merge

FHIR has no $unmerge operation. We built one that reverses a merge using Provenance + History API and lets the client decide what to do with data added between the merge and unmerge.

FHIR Standard Data Quality Analytics Master Data Management Integrations MDMbox

Ivan Shukshin

May 12, 2026

3 min read

Thousands of Duplicate Records in the NPI Registry

We analyzed 7 million records in the NPI Registry and found thousands of providers with multiple NPIs. Explore the duplicates yourself with our interactive tool.

Data Quality Analytics Master Data Management Integrations MDMbox

Elena Zavalishina

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