[nradov]

All large hospitals and clinics already have standardized note formats.

For care transitions the HL7 C-CDA 2.1 Continuity of Care Document (CCD) format works pretty well. Modern EHRs can export a summary of a patient's chart in that format. Some data may be lost in translation but usually it works fine. But there are often still technical obstacles to transporting a CCD from one provider to another.

There are existing formal code systems for notes: CPT, ICD-10-CM, RxNorm, CVX, SNOMED-CT, etc. Those are helpful for billing and analysis purposes, but they can't replace free form narrative text for most clinical use cases.