# Get unique appointment types across ALL appointments (no filters).

Endpoint: GET /site/{siteId}/appointment-types
Version: 1.0
Security: bearer

## Path parameters:

  - `siteId` (string, required)
    Site identifier

## Response 200 fields (application/json):

  - `code` (string, required)
    Example: "WALKIN"

  - `display` (string, required)
    Example: "Walk-in appointment"

  - `system` (string, required)
    Example: "http://terminology.hl7.org/CodeSystem/v2-0276"