## createPreferredPharmacyExtension() function
 
Creates a preferredPharmacy extension object.

**Signature:**

```typescript
export declare function createPreferredPharmacyExtension(orgRef: Reference<Organization>, isPrimary: boolean, preferenceTypeSystem?: string): Extension;
```

## Parameters

| Parameter              | Type                           | Description                                                                                           |
|-----------------------|--------------------------------|-------------------------------------------------------------------------------------------------------|
| orgRef                | Reference<Organization>        | Reference to the Organization resource.                                                               |
| isPrimary             | boolean                        | Whether this is the primary pharmacy.                                                                 |
| preferenceTypeSystem  | string                         | _(Optional)_ Optional coding system URL for pharmacy preference type. Defaults to [PHARMACY_PREFERENCE_TYPE_SYSTEM](/content/docs/sdk/core.pharmacy_preference_type_system/index.html).|

**Returns:**

Extension

The extension object to add to a Patient.

- [createPreferredPharmacyExtension() function](/content/docs/sdk/core.createpreferredpharmacyextension#createpreferredpharmacyextension-function/index.html)
- [Parameters](/content/docs/sdk/core.createpreferredpharmacyextension#parameters/index.html)