Medical Records Identifier

Purpose

Any person can go into any willing medical provider's office and be identified and get care appropriate to their medial history.

There are many cases where a patient presents themselves to a medical provider seeking care. The goal is that they will have some single identifier that they can use to recover their medical history.
Clearly there will be lots of locations were medical records are retained. That will not change soon. This goal is that a single identifier can mediate access to all EHI.
Clearly there will be some sort of sort of Bootstrapping Identity and Consent that gets patient registered for this service, this paper will consider 3:

The user has a Medicare number of the form US:CMS:32fs-233ii-9r38 that is already well-known to the medical community.
The user comes with some Identifier that is not previously know to the provider, perhaps self-issued for cases where they will to take control of their own medical records recovery.
The user comes with no usable Identifier. For this use case we consider the case of a homeless child under the age of 13 being registered for school.

The big problem with any sort of Self-issued Identifier is Trust where there are no standards or examples of any trust without a history of trusted behavior.