Little is known about the perception of system and patient barriers to adequate HIV care by an essential resource in the provision of HIV care, HIV medical care providers. To evaluate such perceptions, between November 2000 and June 2001 a survey was mailed to 526 HIV medical care providers who cared for HIV-infected individuals in Atlanta, Baltimore, Los Angeles, and Miami. Logistic regression analysis of survey results revealed significant differences in perceptions of system barriers between Black and Hispanic providers versus White providers and non-medical doctor providers versus medical doctor providers. Female providers differed significantly from male providers in assessing the importance of certain system and patient barriers. The authors observed that there are seeming disparities in perceptions of system and patient barriers to HIV medical care by providers of different race/ethnic groups, genders, and professions. More research needs to be conducted to determine if these disparities reflect differences in the provision of adequate HIV care for disadvantaged individuals.