To increase response rates, household surveys often turn to mixed-mode designs whereby instruments are designed to be administered via mail, web, telephone, and/or in-person and respondents are allowed to respond to the form most appropriate for them. The application of mixed-mode designs to physician surveys seems natural given that low response rates to single-mode physician surveys are common. Evidence presented at last year's AAPOR conference suggested that one particular mode combination, mail and web, might prove useful in extending the coverage of the survey to a broader mix of physicians because the profile of providers responding online was somewhat different from those responding to a mail survey (Losch, Thompson, & Lutz; Peugh & Zapert). This paper presents the results of an experiment testing two different mixed-mode designs representing two combinations of mail and web surveys. The survey focused on physician evaluations of the Mayo Electronic Medical Record (EMR). 500 physicians were randomly assigned to receive either an initial mail survey with a web survey follow-up to nonrespondents or its converse - an initial web survey followed by a mailed survey to nonrespondents. In both conditions, all physicians received a reminder one week after the initial mailing via the medium corresponding to the initial contact (web v. mail). Key research questions addressed in this paper include: Can mixing mail and web methods increase response rates among physicians? Which of the two combinations tested proved most effective? How does mixing modes impact the participation of different types of physicians? What effect do the different combinations have on the resulting evaluations of the EMR?