# Check CMN

> Perform Check CMN through Brightree.

Source: [https://genhealth.ai/docs/workflows/integrations/brightree/brightree_check_cmn](https://genhealth.ai/docs/workflows/integrations/brightree/brightree_check_cmn)

Integration: [Brightree](https://genhealth.ai/docs/workflows/integrations/brightree.md)

- Handler: `brightree_check_cmn`

- Connection type: `brightree`

## Inputs

- `patient_key` — Patient Key (expression)
  Optional literal value or workflow expression.

## Outputs

- `has_active` — Has Active

Output schema completeness: `best_effort_declared`

## Safety

- External effect: `write`
- Confirmation recommended: no
- Retry safe: no
- Dry run supported: no

## Schemas

These schemas are first-pass authoring guidance. Runtime validation remains authoritative.

### Input schema

```json
{
  "type": "object",
  "properties": {
    "patient_key": {
      "description": "Optional literal value or workflow expression.",
      "x-workflow-field-type": "expression"
    }
  },
  "additionalProperties": false
}
```

### Output schema

```json
{
  "type": "object",
  "properties": {
    "has_active": {}
  },
  "additionalProperties": true
}
```