Many clients attending primary health care (PHC) facilities in developing countries are not aware of all the services available and of all their needs. This study in Bangladesh tested a screening tool for identifying needs for services, other than those requested by clients. The more systematic approach to screening significantly increased the amount of checking for service needs and the number of additional needs identified. The proportion of additional needs that were met also improved, from 24.3% to 80.3% in NGO intervention clinics and from 4.6% to 14.0% in Government clinics. The total number of additional services provided per 100 requested services increased from 12 to 28, and from 3 to 10, respectively. The results suggest that introducing a screening tool more widely in PHC clinics is feasible and could significantly increase coverage of reproductive and child health services.