A little FHIRPath sandbox
Somebody asked for a way to try FHIRPath expressions against a payload without setting up an engine, so I put…
FHIR SDC vs Legacy Web Forms for Clinical Data Capture
Most healthcare teams have a stack of legacy web forms collecting clinical data somewhere in production. The forms work, more…
Open-Source MPI vs Commercial MPI for Mid-Size Hospitals
Mid-size hospitals sit in the awkward middle of the MPI procurement question. They are too large to muddle through with…
Best Value Set Authoring Tools for FHIR in 2026
Value set authoring is the slower-moving cousin of terminology server selection. The runtime gets the attention; the authoring tools that…
Best Form Rendering Libraries for FHIR Apps in 2026
Form rendering libraries are the unglamorous middle layer of FHIR app development. They take a Questionnaire resource the team authored…
Reading a Failing FHIRPath Expression and Finding the Type Mismatch
A failing FHIRPath expression rarely fails loud. It returns an empty collection, or a boolean that flips wrong, or a…
FHIRPath in Questionnaire Calculations
FHIR Questionnaires use FHIRPath in two related places: calculated expressions on items, and enable-when logic that shows or hides items…
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…
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…
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…
Typical FHIRPath Expressions Worth Memorizing
A handful of FHIRPath expressions come up on every real implementation, and having them at your fingertips saves the trip…