Clinical RAG Overview

(ai-services/services/rag/advanced_clinical_rag.py) runs hybrid semantic + lexical retriever retrieval over medical ontologies, clinical guidelines, drug interactions, and payer-specific PA rules.

Components

Semantic: embedding model embeddings + vector index
Keyword: Custom lexical retriever index
Query rewriting: ClinicalQueryRewriter for clinical context-aware reformulation
Ontology expansion: SNOMED-CT, ICD-10, RxNorm

Confidence bands

Band	Range
`VERY_HIGH`	≥ 0.95
`HIGH`	≥ 0.85
`MODERATE`	≥ 0.70
`LOW`	≥ 0.50
`VERY_LOW`	< 0.50

Async facts Hybrid Search

​Components

​Confidence bands

Components

Confidence bands