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

# communication_extension_vcc_coding

Normalized `Communication.extension[].valueCodeableConcept.coding[]` property on the [Communication](https://hl7.org/fhir/R4/communication.html) FHIR resource.

**Primary Keys:**

* communication\_extension\_vcc\_coding\_id

**Foreign Keys:**

* communication\_extension\_id - links to the [communication\_extension](/medical-api/handling-data/schema-v100/communication/extension) table

<div style={{textAlign: 'right'}}><sub>† Metriport Platform added</sub></div>

| Column                                    | Data Type | Description                                         |
| ----------------------------------------- | --------- | --------------------------------------------------- |
| communication\_extension\_vcc\_coding\_id | varchar   | Unique identifier for the coding row                |
| communication\_extension\_id              | varchar   | FK to the parent extension record                   |
| code\_rank†                               | int       | 1-based position of this coding in the source array |
| code                                      | varchar   | Code value                                          |
| display                                   | varchar   | Human-readable display text                         |
| system                                    | varchar   | Coding system URI                                   |

**Related Tables:**

**Parent:**

* [communication\_extension](/medical-api/handling-data/schema-v100/communication/extension)