Lavinia Sociedad Cooperativa, comprising more tan 20,000 Spanish doctors, is also a consequence of the creative energies of Doctor Espriu. Founded in June 1976, its aim was to ensure that all doctors in Spain could have access to the co-operative in equal conditions and could participate in its Governing Body, maintain its line faithful to the principles of medical equality and take part in the management of ASISA, providing healthcare services to its members. Under the baton of its founder, Doctor Espriu, it became owner of all ASISA shares, acquiring them free of charge in January 1977 from the Badalona Igualatorio.

The capital invested in Lavinia is entirely Spanish and its area of operation Spain, governing and managing the activities developed by the ASISA Group. Representatives of doctor-members directly intervene in the management of healthcare activities, through Lavinia's different organs of government and participation.

The name Lavinia comes from one of the poetic works of Salvador Espriu, in allusion to its founder (the poet's brother) and the leading role the Barcelona Igualatorio played in the genesis of the health co-operative movement in Spain.

Lavinia's Statutes define the company as, "a co-operative entity providing services on a national level, of limited liability, and of which people who legally practise the medical profession may become members".

The general assembly annually appoints the main rectors of the co-operative and its group of companies and, thus, establishes the policies that ASISA must follow, approves the statutes and rules and elects the members of the Governing Body.

The current President of the Lavinia Governing Body is Doctor Francisco Ivorra.