There appear to be two definitions floating about for the term, which are not identical, though may be thought to have some overlap. The first is from the source cited in the question, the second from www.nature.com
unpatient.
Term coined in 1996 by the group of bioethical US Albert R. Jonsen to
refer to a persona currently healthy but genetically predisposed
confirmed to a certain disease (p. eg., cancer breast or heart
failure). It's not exactly a sick and need treatment, but neither
considered completely free of disease and must undergo a close medical
surveillance.
In Spanish, it has been proposed translation for
'pre-patient ', which can be used in the case of people who They
receive no health benefit for its pre-genetic disposition; for those
who must go periodically to the doctor, however, already true patients
certainly is clearer translation type of 'presymptomatic patient'
(via google translate)
Unpatients—why patients should own their medical data
We have coined the term 'UnPatient' for our new model of data
ownership as it has the double entendre of the patient subjected to
medical paternalism and information asymmetries, along with the idea
that it has taken far too long to become free to use our medical data
as we see fit and to own it. Without connecting to their medical data,
people are unnecessarily being hurt and dying.
Accordingly, we
urgently seek to promote ownership of one's medical data as a civil
right and as a pivotal strategy to further digitize medicine,
providing a new resource to potentially help every individual who
willingly participates. This is the essence of the benefits of
democratization: shared control provides shared benefits at an
exponential rate. When individuals inform the collective, and the
collective informs the individual, we will have the learning health
system we seek.