Search Patient by Identifier (MRN or else)

[ducu]

Hi all,

I can perform the query supplying the MRN identifier system code as below, but that doesn't seem the way to do it.
Is there a better more elegant way?

from fhirclient import client
from fhirclient.models.patient import Patient as FHIRPatient

settings = {
    "app_id": "NOT_USED_YET",
    "api_base": "https://fhir-open.cerner.com/r4/ec2458f2-1e24-41c8-b71b-0e701af7583d"
}

def get_patient_by_mrn(mrn):
    smart = client.FHIRClient(settings=settings)

    query = FHIRPatient.where(struct={
        'identifier': 'urn:oid:2.16.840.1.113883.6.1000|%s' % mrn
        })
    try:
        resources = query.perform_resources(smart.server)
    except Exception as ex:
        print(str(ex))

Thanks for the great work, I'm willing to contribute