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Emily Cromwell

Emily Cromwell

Notes on FHIR terminology servers, SDC form tooling, and master patient index patterns for US health IT teams.

  • Terminology server
  • Medical form builder
  • Master patient index
Editorial illustration in editorial-ink style depicting verbose vs .extension(url) shortcut FHIRPath navigation with nested us-core-race extension anatomy

Extension Navigation With FHIRPath: The ext(url) Shortcut

Extensions are how FHIR carries what the base spec did not model, and navigating them is one of the most…

Editorial illustration in editorial-ink style depicting a corpus of production FHIR payloads flowing into two FHIRPath evaluators with three verdict boxes

Testing FHIRPath Expressions Against Real Production Resources

A FHIRPath expression that passes on the demo resource in the spec often fails on the payload that actually arrives…

Editorial illustration in editorial-ink style depicting a FHIRPath invariant tested against valid, invalid, and empty payload shapes with verdicts

Using FHIRPath in Invariants Without Shooting Yourself in the Foot

Invariants written in FHIRPath are the mechanism by which profiles enforce rules that go beyond cardinality and datatype. They are…

Ditching Paper Chaos - My FHIR EMR Revelation

Ditching Paper Chaos - My FHIR EMR Revelation

Have you ever felt like you’re drowning in a sea of paper charts, sticky notes, and illegible doctor’s handwriting? I…

My Unexpected Detour (and Triumph!) on the Road to FHIR Compliance

My Unexpected Detour (and Triumph!) on the Road to FHIR Compliance

Have you ever felt completely lost, wandering through a maze of acronyms and technical jargon, only to realize you’re supposed…

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Recent Posts

  • Extension Navigation With FHIRPath: The ext(url) Shortcut
  • Testing FHIRPath Expressions Against Real Production Resources
  • Using FHIRPath in Invariants Without Shooting Yourself in the Foot
  • Typical FHIRPath Expressions Worth Memorizing
  • The Collection Semantics That Surprise You at First

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