# BioClinical Medical Coding Model

## Model Description
This is a BioClinicalModernBERT-based model for automated medical coding. The model predicts ICD-10-CM diagnosis codes and HCPCS/CPT procedure codes from clinical notes.

## Model Architecture
- **Base Model**: microsoft/BiomedNLP-BiomedBERT-base-uncased-abstract-fulltext
- **Training**: 3-phase fine-tuning approach
  - Phase 1: Dense retrieval training
  - Phase 2: Hard negative re-ranking
  - Phase 3: Multi-label classification
- **Code Vocabulary**: 31794 modern medical codes
- **Performance**: F1-score: 0.80-0.88 on frequent codes

## Usage

```python
from inference import MedicalCodingPredictor

# Initialize predictor
predictor = MedicalCodingPredictor()

# Predict codes from clinical note
clinical_note = "Patient presents with chest pain and elevated cardiac enzymes..."
predictions = predictor.predict(clinical_note, threshold=0.5)

for pred in predictions:
    print(f"Code: {pred['code']}")
    print(f"Type: {pred['type']}")
    print(f"Description: {pred['description']}")
    print(f"Confidence: {pred['confidence']:.3f}")
```

## API Response Format
```json
{
  "code": "I25.111",
  "type": "ICD-10-CM",
  "description": "CODE DESCRIPTION",
  "confidence": 0.85,
  "f1_score": 0.82
}
```

## Files Included
- `pytorch_model.bin`: Model weights
- `config.json`: Model configuration
- `code_to_idx.json`: Code to index mapping
- `idx_to_code.json`: Index to code mapping
- `code_descriptions.json`: Code descriptions
- `code_f1_scores.json`: Per-code F1 scores
- `inference.py`: Inference script
- `requirements.txt`: Dependencies

## Training Data
Trained on MIMIC-IV clinical notes with temporal matching for accurate code assignment.

## Limitations
- Generic code descriptions (update with medical terminology database)
- Performance varies by code frequency
- Requires clinical validation for production use

## Citation
If you use this model, please cite the MIMIC-IV dataset and acknowledge the multi-stage training approach.