K - Why no HL7, FHIIR, openEHR, CDA, LOINC yet ?

Pick a card ... Any card ? That's how it used to be but it's looking like we have a winner in EHR interoperability standards. HL7 FHIR AAA will fully support this standard by the end of the year.

So why do you support ICD-10 ?

Because it has gained traction amongst many software suppliers but primarily because the UK NHS has endorsed it and is committed to it - there is no going back.