I was just thinking about trying to make something to do this.

I asked Google Bard to create a HL7 message for me using this prompt: 

"create an ECG order hl7 message example for HL7 v2 2.4"

And I got this:

MSH|^~&|EPICADT|EPICADT|CERNER|CERNER|20230804120000||ORM^O01|1234567890|P|2.4 PID|1||1234567890^^^EPICADT^MR||DOE^JOHN||19800805|M||123 MAIN ST^^ANYTOWN^CA^91234^USA^^H PV1|1|I|INPATIENT|||||||ADMITTING PHYSICIAN^LAST^FIRST^M^MD ORC|1|NW|1234567890^EPICADT^MR|1234567890^EPICADT^MR|86702^ELECTROCARDIOGRAM^LOINC||20230804120000||||||20230804120000 OBR|1|NW|1234567890^EPICADT^MR|1234567890^EPICADT^MR|86702^ELECTROCARDIOGRAM^LOINC||20230804120000||||||20230804120000

If you want to quickly generate a message it might be helpful

It did get me thinking that an LLM could be the way to go here

You can also differentiate instances by downloading the browser extension I developed (IRIS WHIZ) and enabling the header colours/tab grouping 

See the header colour and tab group in the screenshot below

(also circled in red but not relevant is the highlighted the erroring components section as this screenshot is from the app's Open Exchange screenshot section where I was trying to get at many features highlighted in it as possible)

Well done everyone!