---
language:
- en
license: apache-2.0
task_categories:
- text-classification
- text-generation
tags:
- medical
- icd-10
- clinical-notes
- medgemma
- synthetic
- healthcare
- diagnosis-coding
- cardiology
size_categories:
- 1K<n<10K
pretty_name: Disease of Circulatory System I00-I99
---

# MedGemma ICD-10 Clinical Notes Dataset — Circulatory System

Synthetic clinical notes generated by **MedGemma-4B-IT** for fine-tuning ICD-10-CM diagnosis code prediction models. Focused on **Chapter 9: Diseases of the Circulatory System (I00-I99)**.

## Dataset Summary

| Split | Examples | Unique ICD-10 Codes |
|-------|----------|---------------------|
| Train | 6,275 | 1,255 |

Each example is a realistic clinical note paired with its ICD-10-CM diagnosis code, formatted as a chat conversation for instruction fine-tuning.

## How It Was Generated

Clinical notes were generated using **MedGemma-4B-IT** (Google's medical LLM) loaded locally with 4-bit NF4 quantization — a form of **self-distillation**. For each of the 1,255 billable I-codes in ICD-10-CM 2026, the model generated 5 clinical notes with:

- **10 prompt templates** — varying documentation styles (SOAP notes, H&P, progress notes, consultation reports, brief assessments)
- **Randomized demographics** — patient ages 18-89, male/female
- **Weighted clinical settings** — cardiology outpatient clinic, emergency department, cardiac catheterization lab, inpatient cardiac unit, primary care office, vascular surgery clinic, cardiac rehabilitation center
- **No data leakage** — the model was explicitly instructed to never mention ICD codes or state the exact diagnosis name, only describe the clinical presentation

Generation took ~80 hours on a single NVIDIA RTX 5070 (12GB VRAM).

## Data Format

Each record contains:

```json
{
  "messages": [
    {
      "role": "user",
      "content": "Given the following clinical note, predict the ICD-10-CM diagnosis code:\n\n<clinical note text>"
    },
    {
      "role": "assistant",
      "content": "ICD-10-CM Code: I25.10\nDiagnosis: Atherosclerotic heart disease of native coronary artery without angina pectoris\nShort: Athscl heart disease of native cor art w/o ang pctrs"
    }
  ],
  "code": "I2510",
  "category": "Circulatory System",
  "clinical_note": "<raw clinical note text>"
}
```

### Fields

| Field | Description |
|-------|-------------|
| `messages` | Chat-format conversation (user prompt + assistant target) ready for instruction fine-tuning |
| `code` | Raw ICD-10-CM code (without dot separator) |
| `category` | ICD-10 chapter — always "Circulatory System" for this dataset |
| `clinical_note` | The generated clinical note (same text embedded in the user message) |

## Clinical Note Statistics

| Metric | Value |
|--------|-------|
| Average length | 2,021 characters (~280 words) |
| Minimum length | 1,202 characters (~170 words) |
| Maximum length | 2,549 characters (~360 words) |
| Note styles | SOAP, H&P, progress, consultation, assessment |
| Augmentation | 5 notes per ICD-10 code |

## ICD-10 Coverage

- **Chapter**: 9 — Diseases of the Circulatory System
- **Code range**: I00–I99
- **Total billable codes**: 1,255
- **Source**: CMS ICD-10-CM 2026 code descriptions (`icd10cm_order_2026.txt`)

Covers conditions including:
- Acute rheumatic fever (I00-I02)
- Chronic rheumatic heart diseases (I05-I09)
- Hypertensive diseases (I10-I16)
- Ischemic heart diseases (I20-I25)
- Pulmonary heart disease (I26-I28)
- Other forms of heart disease (I30-I52)
- Cerebrovascular diseases (I60-I69)
- Diseases of arteries, arterioles & capillaries (I70-I79)
- Diseases of veins & lymphatics (I80-I89)
- Other circulatory disorders (I95-I99)

## Intended Use

- **Fine-tuning** medical LLMs for automated ICD-10 diagnosis coding
- **Benchmarking** clinical NLP models on structured code prediction
- **Research** into synthetic medical data generation and self-distillation

## Limitations

- **Synthetic data** — generated by an LLM, not sourced from real clinical records
- **Single chapter** — covers only Circulatory System (I00-I99), not the full ICD-10-CM
- **Single diagnosis** — each note maps to one code; real encounters often have multiple diagnoses
- **No validation by medical professionals** — notes may contain clinical inaccuracies

## Loading the Dataset

```python
from datasets import load_dataset

# Load from local directory
dataset = load_dataset("json", data_files="train_data.json")

# Or load from Hugging Face Hub (after upload)
# dataset = load_dataset("YOUR_USERNAME/medgemma-icd10-circulatory")
```


## Citation

If you use this dataset, please cite the repository:

```bibtex
@misc{medgemma_icd10_finetuning,
  title={Fine-Tuning MedGemma-4B for ICD-10 Diagnosis Coding},
  author={singhak-abbvie},
  year={2026}
}
```

## Disclaimer

This dataset is for **research and educational purposes only**. It is not intended for clinical use without proper validation. Always consult certified medical coders and healthcare professionals for production ICD-10 coding.