Study Objective: To survey American anesthesiology residency program directors to determine the availability and extent of training in peripheral nerve block techniques. Design: Survey questionnaire was mailed and faxed to 132 American anathesiology residency program directors and followed up 4 weeks later with another mailing to nonresponders. Setting: University medical center. Measurements and Main Results: Of the 132 American anesthesiology residency program directors surveyed, 69 (52%) responded. Of the responders, 40 (58%) offered a specific perpheral nerve block rotation. The rotation was of I month's duration in 61% of these programs. Formal instruction was administered during the rotation in 69%. The regional instruction approach consisted of a nerve stimulator (98%), paresthesia (75%), and transarterial (85%). Multimedia, mannequins, and cadaver dissection were used infrequently (13-25%). During the rotation, residents performed a variety of blocks, but the number of each block varied from 2 (supraclavicular) to 10 (axillary). These blocks were performed in the operating room in 48% of programs. Finally, in the programs with a specific peripheral nerve block rotation, residents were evaluated. Conclusions: Specific peripheral nerve block rotations are not always included in anesthesiology residents' curriculum. In addition, residents in programs with a specific nerve block rotation are exposed to a greater number of peripheral nerve block techniques than those who do not have such a rotation included in their curriculum. (C) 2003 by Elsevier Science Inc.