- require type as identifier is using the same system as other card types
- assume CRN has all separators removed '-'
Example:
<Patient>
...
<identifier>
<type>
<coding>
<system value="http://hl7.org/fhir/v2/0203"/>
<code value="HC"/>
<display value="Health Card Number"/>
</coding>
<text value="Health Card Number"/>
</type>
<system value="http://ns.electronichealth.net.au/id/hi/crn"/>
<value value="307111942H"/>
</identifier>
...
</patient>