> ## Documentation Index
> Fetch the complete documentation index at: https://docs.corti.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# CPT

> Current Procedural Terminology. The universal language for describing medical, surgical, and diagnostic services in the US outpatient setting and for physician billing

The standard procedure coding system for US outpatient settings, maintained by the AMA and updated annually. Required for physician billing, ambulatory surgery centers, and most outpatient claims. 5-digit numeric codes (e.g., `99213` for an office visit, `93000` for an ECG).

## Quick start

System identifier: `cpt`

<CodeGroup>
  ```bash curl theme={null}
  curl -X POST "https://api.$environment.corti.app/v2/tools/coding/" \
    -H "Authorization: Bearer <token>" \
    -H "Tenant-Name: <tenant-name>" \
    -H "Content-Type: application/json" \
    -d '{
      "system": ["cpt"],
      "context": [{"type": "text", "text": "Office visit for established patient with hypertension and follow-up ECG performed."}]
    }'
  ```

  ```ts JavaScript theme={null}
  const response = await client.codes.predict({
    system: ["cpt"],
    context: [{ type: "text", text: "Office visit for established patient with hypertension and follow-up ECG performed." }],
  });
  ```

  ```python Python theme={null}
  import requests

  response = requests.post(
      "https://api.$environment.corti.app/v2/tools/coding/",
      headers={
          "Authorization": "Bearer <token>",
          "Tenant-Name": "<tenant-name>",
      },
      json={
          "system": ["cpt"],
          "context": [{"type": "text", "text": "Office visit for established patient with hypertension and follow-up ECG performed."}],
      },
  )
  print(response.json())
  ```
</CodeGroup>

[API reference →](/api-reference/codes/predict-codes)

<Note>
  We have only evaluated this implementation on data from a limited set of specialties. This may not generalize to all hospitals. [Contact us](https://www.corti.ai/contact-us?products=medical-coding,api\&use_case=I'm%20using%20CPT%20%28United%20States%29%20via%20the%20Corti%20Medical%20Coding%20API%20and%20would%20like%20to%20share%20feedback%20on%20my%20experience.) to share feedback or report issues.
</Note>