What is a Synthea module and how do I make one with Claude?

Synthea modules are JSON state machines for generating synthetic patient FHIR data. Install the Claude skill from github:mock-health/samples/synthea-module-skill, then prompt "/synthea create [disease] module"—it validates all codes automatically.

How do I validate SNOMED or LOINC codes for Synthea?

Use tx.fhir.org: curl "https://tx.fhir.org/r4/CodeSystem/\$validate-code

Does Synthea generate realistic comorbidities?

No—modules run independently, so no interactions. 10k patients often miss major diseases like heart disease; extend with custom modules for better fidelity.

🚀 New Releases

Claude's Secret Weapon: Forging Bulletproof Synthea Modules Without Hallucinated Codes

LLMs spit out plausible medical codes that secretly wreck your Synthea simulations. Here's the dead-simple workflow—and Claude skill—that validates every one before it poisons your data.

DevTools Feed Apr 03, 2026 3 min read 13 views

Claude AI generating a validated Synthea disease module JSON with FHIR code checks

⚡ Key Takeaways

LLMs hallucinate medical codes that look real but corrupt FHIR—fix with tx.fhir.org validation curls. 𝕏
Claude Code skill automates full Synthea module creation: research, code lookup, build, test. 𝕏
Synthea's limits (no comorbidities, over-diagnosed elders) demand custom modules for serious use. 𝕏

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#Claude AI #FHIR validation #Synthea modules #synthetic patient data

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