> ## Documentation Index
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# immunization_extension_vcc_coding

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

**Primary Keys:**

* immunization\_extension\_vcc\_coding\_id

**Foreign Keys:**

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

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

| Column                                   | Data Type | Description                                         |
| ---------------------------------------- | --------- | --------------------------------------------------- |
| immunization\_extension\_vcc\_coding\_id | varchar   | Unique identifier for the coding row                |
| immunization\_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:**

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