API end point: https://clovermembers.careevolution.com/WebClient/api/fhir-r4.
https://clovermembers.careevolution.com/WebClient/api/fhir-r4
http://careevolution.com/fhirextensions#explanationOfBenefit-controlNumber
Control number of the claim
Used in ExplanationOfBenefit resources
Type string