A person who is directly or indirectly involved in the provisioning of healthcare.

Need to track doctors, staff, locums etc. for both healthcare practitioners, funders, etc.

Note that a cab driver no longer fits the bill. You probably would be interested in the organization rather than the individual?

An identifier that applies to this person in this role.

Often, specific identities are assigned for the agent.

A name associated with the person.

Contact persons need to be identified by name, but it is uncommon to need details about multiple other names for that person.

A contact detail for the practitioner, e.g. a telephone number or an email address.

Need to know how to reach a practitioner.

Person may have multiple ways to be contacted with different uses or applicable periods. May need to have options for contacting the person urgently, and also to help with identification.

The postal address where the practitioner can be found or visited or to which mail can be delivered.

Need to keep track where the practitioner can found during work or for directing mail.

Administrative Gender - the gender that the person is considered to have for administration and record keeping purposes.

Needed to address the person correctly.

The date of birth for the practitioner.

Needed for identification.

Image of the person.

Many EHR systems have the capability to capture an image of patients and personnel. Fits with newer social media usage too.

The list of Roles/Organizations that the Practitioner is associated with.

The Organization where the Practitioner performs the roles associated.

Roles which this practitioner is authorized to perform for the organization.

Need to know what authority the practitioner has - what can they do?

A person may have more than one role. At least one role is required.

Specific specialty of the practitioner.

The period during which the person is authorized to act as a practitioner in these role(s) for the organization.

Even after the agencies is revoked, the fact that it existed must still be recorded.

The location(s) at which this practitioner provides care.

The list of healthcare services that this worker provides for this role's Organization/Location(s).

Qualifications obtained by training and certification.

An identifier that applies to this person's qualification in this role.

Often, specific identities are assigned for the qualification.

Coded representation of the qualification.

Period during which the qualification is valid.

Qualifications are often for a limited period of time, and can be revoked.

Organization that regulates and issues the qualification.

A language the practitioner is able to use in patient communication.

Knowing which language a practitioner speaks can help in facilitating communication with patients.

The structure aa-BB with this exact casing is one the most widely used notations for locale. However not all systems actually code this but instead have it as free text. Hence CodeableConcept instead of code as the data type.