Objectives We conducted a case study of an urban immunization outreach strategy to determine the feasibility of the intervention and to measure administrative immunization coverage outcomes. Methods A multipronged strategy for improving immunization coverage in Urban Patna, India, was implemented for 1year (2009/2010). The strategy was designed to increase immunization sites, shift human resources, plan logistics, improve community mobilization, provide supervision, strengthen data flow and implement special vaccination drives. Results Over 1year, the coverage of all primary vaccines of the Universal Immunization Program improved by over 100%. Conclusion Coverage can be rapidly improved through outreach immunization in low socioeconomic areas if existing opportunities are carefully utilized. © 2011 Blackwell Publishing Ltd.