The results of a survey of physicians actively involved at the state level in policy development for Part H of Public Law 99-457 are reported. A questionnaire was completed by a total of 125 physicians, including physicians identified as Interagency Coordinating Council (ICC) members and physicians who served as state chapter representatives to the American Academy of Pediatrics conference on Public Law 99-457. Examined are the roles physicians have taken in state planning for early intervention services for infants and toddlers with developmental delays, their attitudes toward the eligibility of at-risk children under Part H, their assessment of the relationship between the private health sector and the public human service system, and their perspectives on the major barriers to implementation. Findings included, among others, that six states had no physicians involved in the work of their ICCs; that there was strong consensus in favor of broad-based eligibility criteria; and that physicians reported modest improvement in the relationship between the private health care sector and the public human service system since enactment of the law. Policy implications are outlined. An appendix contains the survey form, and 15 references are cited. (JDD)