HealthcareAI

AI Clinical Workflow Infrastructure

Grounded Clinical AI with FHIR Citations, Guardrails, and Evaluation

Industry
Digital Health
Duration
8-week build
Team Size
5 engineers
Client
Clinical AI Platform
3–5
Synthetic Patients
15–20
Eval Questions
RAG + Citations
Answer Mode

Overview

CodeBricks built a grounded clinical AI workflow implementation that answers questions from synthetic FHIR patient records. The system retrieves relevant resources, constrains the model to the available context, and shows citations for every answer. It also includes an evaluation page and audit log, demonstrating the engineering discipline required for healthcare AI beyond a generic chatbot wrapper.

01

The Challenge

Healthcare AI proof-of-concepts often look impressive at first, but many fail under technical review because the model answers without evidence. In a clinical setting, an unsupported answer is risky and difficult to trust. The core problem is how to let a clinician ask useful questions about a patient record while keeping the model grounded in actual FHIR data, refusing when information is missing, and leaving an audit trail that engineering and clinical teams can review.

02

Research & Strategy

We separated the clinical UI from the retrieval and answering layer. Synthetic Synthea FHIR bundles load into a local index; each question triggers intent classification and retrieval of only the most relevant Patient, Observation, Condition, MedicationRequest, AllergyIntolerance, Encounter, and Procedure resources. The LLM receives a constrained prompt built from that context alone, returns answers with resource-level citations, and logs every interaction. An evaluation harness with negative-control questions measures pass/fail behavior before production handoff.

03

The Solution

Patient selector for 3 to 5 synthetic Synthea FHIR patient bundles
Chat-style clinical question interface with visible evidence panel
Retrieval pipeline indexing FHIR resources by patient and resource type
Grounded answer generation with cited FHIR resource IDs on every response
Guardrails that refuse unsupported questions and flag missing record data
Evaluation page with 15–20 test questions, expected vs actual answers, and failure reasons
Audit log capturing question, answer, retrieved resources, timestamp, and patient context
Embeddings plus local vector search (FAISS/Chroma) for reproducible isolated-environment runs
Negative-control test cases validating refusal when records lack sufficient information
Clear in-product disclaimer: not clinical decision support; synthetic data only
04

Results & Impact

3–5
Synthetic Patients
15–20
Eval Questions
RAG + Citations
Answer Mode

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Tech Stack

ReactNext.jsTypeScriptNode.jsPythonOpenAI APILangChainFAISSFHIR R4Synthea

Project Info

ClientClinical AI Platform
IndustryDigital Health
Duration8-week build
Team Size5 engineers