# ReferenceRange

Model ID: `diagnostics.ReferenceRange`

The normal/expected range for a lab observation's value.

Type: `object`

## Fields

| Field | Type | Required | Format | Allowed values | Default | Nullable | Description |
|---|---|---:|---|---|---|---:|---|
| `high` | `number|null` | No |  |  |  | Yes | Upper bound of the normal range, optional. |
| `low` | `number|null` | No |  |  |  | Yes | Lower bound of the normal range, optional. |
| `text` | `string|null` | No |  |  |  | Yes | Free-text range description, e.g. 'Negative', optional. |
| `unit` | `string|null` | No |  |  |  | Yes | Unit of measure for low/high, optional. |

## Example

None declared in canonical OpenAPI.