Caller descriptions and evaluations of their experiences with telephone advice services provide unique information that correlates highly with objective measures of quality and can help interpret data from other sources. An author-developed questionnaire assessed caller outcomes of telephone nursing advice in Phase I an iterative, purposive sample of 40 callers was interviewed by phone. An emergent design was used to develop questions, analyze constructs of interest, and test questions for a draft caller questionnaire, which was tested in Phase II. Responses to the questionnaire provided information about caller characteristics, advice call characteristics, and nurse practice behaviors that caused the authors to further revise the questionnaire. The resulting tool provides feedback to advice nurses about the outcomes of their practice and information to design orientation and development programs and support fund allocation decisions.