The data processing of health for purposes d’investigació requires the consent of the headline of the data or, alternatively, that the identificatives data are sorted out from the clinicoassistencials, by such d’assegurar l’anonimat of the titular physical person. To lack of consent or d’anonimització of the data of health, they can only treat themselves without consent if the sufficient habilitation, foreseen in a rule with rank of law (article 7 of the LOPD), is had. In the examined regulations there are not forecasts, in relation to relevant scientific l’interès, l’elevat number of participants, the retrospective character d’un observational study or l’absència of risk for the health, which allow to exempt the consent of the persons concerned in relation to the treatment of its data, in the context of the observational studies, from l’obligació of picking up. This, without harm that there is another habilitation in rules with legal rank for the data processing personal, in relation to these circumstances.