Observation Create not working

[Franco Olesen]

Hi. I'm having trouble writing to an Observation which is returned with the following category and code by GET Observation:

"category": [

                    {

                        "extension": [

                            {

                                "valueCode": "unknown",

                                "url": "http://hl7.org/fhir/StructureDefinition/data-absent-reason"

                            }

                        ]

                    }

                ],

                "code": {

                    "coding": [

                        {

                            "system": "https://fhir.cerner.com/XXXXXXXXX/codeSet/72",

                            "code": "704644",

                            "display": "Advance Directive",

                            "userSelected": true

                        },

                        {

                            "system": "http://snomed.info/sct",

                            "code": "425392003",

                            "display": "Active advance directive (finding)"

                        }

                    ],

                    "text": "Advance Directive"

                },

I'm trying to write to it (using the same category object returned in GET Observation) but the error returned by the API reads:
"Observation.category[0].coding: cannot be blank"

What does this mean? Do you have a list of categories currently supported by Cerner for write operations?

Thank you!

[Joe Rattazzi (Cerner)]

Hi,

Cerner's FHIR R4 Observation implementation currently only supports the "Laboratory" and "Vital Signs" Categories. You can find the details documented here: https://fhir.cerner.com/millennium/r4/clinical/diagnostics/observation/#body-fields

As a note - the Category you've provided (Data-absent-reason) means that no data is available. We tend to use that to describe Observations within our system that we're able to return but aren't able to categorize into a FHIR-defined category.  Since we require a Category during writes (and Data-absent-reason means no category is available), you're receiving the error that the coding information is blank.

Hope that helps,

- Joe (Cerner)