INT - Returning 400 - with diagnostic Missing or "Empty NHSD-End-User-Organisation-ODS header."

e-Referral Service (e-RS)
1

Hi Support,

this morning we are seeing return code 400 on all FHIR endpoints in the INT environment.

e.g.

Last request headers

A008 POST /a008/fetch-worklist

content-type: application/fhir+json
nhsd-end-user-organisation-ods: R1V
nhsd-ers-business-function: SERVICE_PROVIDER_CLINICIAN


Last response

400 

{ "resourceType": "OperationOutcome", "meta": { "lastUpdated": "2026-04-08T09:33:27.246Z", "profile" : [ "https://fhir.nhs.uk/STU3/StructureDefinition/eRS-OperationOutcome-1" ] }, "issue": [ { "severity": "error", "code": "required", "details": { "coding": [ { "system": "https://fhir.nhs.uk/STU3/CodeSystem/eRS-APIErrorCode-1", "code": "MISSING_HEADER" } ] }, "diagnostics": "Missing or Empty NHSD-End-User-Organisation-ODS header." } ] }
2

@George_Craft Please could you look at this one also - may be related to the other post here today

3

Yes no problem, I am having a look at them both now.

1 Like
4

Hi Support,

Also reported in production; we will get affected sites to raise a ticket on the NHSE support portal.

Kind Regards,
Sean

5

Hi all,

The current position is that the issue has been caused by a recent APIM release, and this release is going to be rolled back in production and int environments today