Clinical Assertion and Negation BERT

huggingface
Text & Chat

Text-classification model from Betty van Aken that decides whether a medical condition mentioned in a clinical note is present, absent or possible. The target entity is marked in the input with [entity] tags, and the model returns the assertion status. Built on Bio_ClinicalBERT and trained on the 2010 i2b2/VA assertion data.

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TL;DR·Last updated June 24, 2026

Clinical Assertion and Negation BERT is text & chat AI model from huggingface, priced at €0.000 per 1M input tokens with a unknown context window.

About this model

clinical-assertion-negation-bert classifies the assertion status of a flagged condition in a clinical sentence into PRESENT, ABSENT or POSSIBLE. You wrap the condition in [entity] and [/entity] markers, and the model judges whether the note asserts, negates or hedges it. This is the negation and uncertainty step that disease NER alone misses, for example separating diagnosed from ruled-out findings. It is fine-tuned from Bio_ClinicalBERT on the i2b2 2010 assertion task.
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0.7

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Pricing

Price per Generation
Per generation€1.00

API Integration

Use our OpenAI-compatible API to integrate Clinical Assertion and Negation BERT into your application.

Install
npm install railwail
JavaScript / TypeScript
import railwail from "railwail";

const rw = railwail("YOUR_API_KEY");

// Simple — just pass a string
const reply = await rw.run("clinical-assertion-negation-bert", "Hello! What can you do?");
console.log(reply);

// With message history
const reply2 = await rw.run("clinical-assertion-negation-bert", [
  { role: "system", content: "You are a helpful assistant." },
  { role: "user", content: "Explain quantum computing simply." },
]);
console.log(reply2);

// Full response with usage info
const res = await rw.chat("clinical-assertion-negation-bert", [
  { role: "user", content: "Hello!" },
], { temperature: 0.7, max_tokens: 500 });
console.log(res.choices[0].message.content);
console.log(res.usage);
Specifications
Price
€1.00
Developer
huggingface
Category
Text & Chat
Supported Formats
text
Tags
medical
research
nlp
huggingface
text-classification
assertion
negation
clinicalbert
i2b2

Frequently asked questions

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