I uploaded a FHIR JSON file (from Synthea) via the batch file upload web interface. No errors. I can view the Patient info. However, I don't see some FHIR resources such as Claim, ExplanationOfBenefit etc. for this patient, even though they are present in the JSON. In fact, I uploaded a few other sample patients, and I cannot see Claim, Account, Invoice etc. for any of them. I can provide additional info as needed. The JSON looks OK to me. Thanks.

Do you mind sharing the bundle?

I have attached the complete bundle which is the ADa662*.json file. This is the one I uploaded via the Medplum batch upload interface, and encounter resource (among others) is not being extracted. To debug, I extracted small snippets of this file (ada1.json) and compared with lucien1.json which actually works. I think lucien is the sample you provide as one of your example samples, though I believe it is also from Synthea. The only difference between the snippets seems to be the ordering of the resourceType field within the resource like so: "resource": { "resourceType": "Encounter", "id": "2fae0e14-5528-1dc9-e682-5bd60bf7e018", for the ada patient vs. a slightly different ordering for the lucien patient. Ordering of key value pairs shouldn't matter for JSON parsing, so I am not sure if this is the cause. I didn't compare the entire JSON files for the 2 patients. Lucien works, Ada doesn't. To clarify, this is a slightly different (though perhaps related) issue to the problem of other resources like Claim etc. not being extracted. I was surprised that even Encounter resource is not being extracted for some of these uploads. Claim, Account, Invoice, ExplanationOfBenefit etc. are not always present in many of the Synthea samples ; for example, your Lucien sample, I don't believe has these billing type resources, so they wouldn't be extracted. Do you expect the FHIR JSON upload to conform to any particular format, besides the standard R4? I assume that any Synthea FHIR R4 should work. This Ada* json file is from https://synthea.mitre.org/downloads , one of the 100 samples for the latest synthea version FHIR R4.