When health professionals offer primary health services on a private m
arket a number of problems can arise to do with choice, quality and su
pplier-induced demand. Professional self-regulation through qualificat
ion requirements and licensing procedures may offset some of the worst
problems. However, in the UK, the primary health care sector is also
subject to additional regulatory controls set within the context of th
e NHS. Private practitioners within the NHS function in a quasi-market
setting, in which they are funded by public health authorities to pro
vide services free at the point of delivery to their patients. Within
this context there is regulation of quality, entry, prices and profits
. This system can be contrasted with the much less extensive set of re
gulations applied to more market-based systems operating in countries
such as the USA. Recent reforms in the UK have, however, initiated a m
ovement towards a market-led system, extended the autonomy of health c
are practitioners, and increased the scope of financial incentives as
a mechanism to promote professional quality and innovation. This artic
le draws on the insights developed in Propper (1993) in her study of r
egulation and quasi-markets in secondary health care, education and co
mmunity care. Its focus is on the extent of regulation in primary heal
th care services; the effects of increased financial incentives on pro
fessional performance brought about by the NHS reforms; and, the scope
for further deregulation of professional services in primary care.