[R4] Coverage Retrieve by id

content/millennium/r4/financial/support/coverage.md

@@ -54,6 +54,8 @@ _Implementation Notes_
 
 * Public Healthcare represents an insurance policy funded by a public health system such as a provincial or national health plan. If there are any public coverages, they will return with an id prefixed with 'PH' or 'PHP' and will be returned in the payload with the rest of the coverages (private coverages).
 
+* Search with `_id` is not supported.
+
 ### Authorization Types
 
 <%= authorization_types(provider: true, patient: false, system: true) %>
@@ -125,6 +127,76 @@ _Implementation Notes_
 
 The common [errors] and [OperationOutcomes] may be returned.
 
+## Retrieve by id
+
+List an individual Coverage by its id:
+
+    GET /Coverage/:id
+
+### Authorization Types
+
+<%= authorization_types(provider: true, patient: false, system: true) %>
+
+### Headers
+
+<%= headers fhir_json: true %>
+
+### Example - Patient-level Private Coverage
+
+#### Request
+
+    GET https://fhir-ehr-code.cerner.com/r4/ec2458f2-1e24-41c8-b71b-0e701af7583d/Coverage/12724066-490016987-490016987
+
+#### Response
+
+<%= headers status: 200 %>
+<%= json(:r4_coverage_patient_bundle_entry) %>
+
+<%= disclaimer %>
+
+### Example - Patient-level Public Coverage
+
+#### Request
+
+    GET https://fhir-ehr-code.cerner.com/r4/ec2458f2-1e24-41c8-b71b-0e701af7583d/Coverage/PHP-490218084-12724066
+
+#### Response
+
+<%= headers status: 200 %>
+<%= json(:r4_coverage_patient_social_healthcare_bundle_entry) %>
+
+<%= disclaimer %>
+
+### Example - Encounter-level Private Coverage
+
+#### Request
+
+    GET https://fhir-ehr-code.cerner.com/r4/ec2458f2-1e24-41c8-b71b-0e701af7583d/Coverage/97954095-98320174
+
+#### Response
+
+<%= headers status: 200 %>
+<%= json(:r4_coverage_encounter_bundle_entry) %>
+
+<%= disclaimer %>
+
+### Example - Encounter-level Public Coverage
+
+#### Request
+
+    GET https://fhir-ehr-code.cerner.com/r4/ec2458f2-1e24-41c8-b71b-0e701af7583d/Coverage/PH-98371617-97701467
+
+#### Response
+
+<%= headers status: 200 %>
+<%= json(:r4_coverage_encounter_social_healthcare_bundle_entry) %>
+
+<%= disclaimer %>
+
+### Errors
+
+The common [errors] and [OperationOutcomes] may be returned.
+
 ## Create
 
 Create new Patient-level or Encounter-level Coverages.