In this example, the creator of the Organization resource does not possess the organization’s telephone or other contact information that would be conveyed in the Organization.telecom element. To communicate that, .telecom is populated with the data-absent-reason extension, containing the code, unknown.
Example data content
Organization
id@value: specialty-rx-organization-pharmacy-2-unknown-telecom
metaprofile@value: http://hl7.org/fhir/us/specialty-rx/StructureDefinition/specialty-rx-organization-pharmacy
identifiersystem@value: http://hl7.org/fhir/sid/us-npivalue@value: 1669512345
active@value: true
typecodingsystem@value: http://terminology.hl7.org/CodeSystem/organization-typecode@value: provdisplay@value: Healthcare Provider
name@value: Our Pharmacy
telecomextension@url: http://hl7.org/fhir/StructureDefinition/data-absent-reasonvalueCode@value: unknown
addressline@value: 220 Oak Stcity@value: Minneapolisstate@value: MNpostalCode@value: 55008country@value: USA
Generated Narrative
identifier: id: 1669512345
active: true
type: Healthcare Provider
name: Our Pharmacy
telecom: -unknown-
address: 220 Oak St Minneapolis MN 55008 USA