In many cases, skin conditions in HIV+ persons respond only to one of the therapies employing ultraviolet radiation (UV). We surveyed the indications for the use of UV therapy for HIV+ patients (pts.), the HIV infection status of these pts., and the UV modalities used. Basic data were collected (41 clinics at 18 locations with a high prevalence of HIV infection) on 3,716 UV therapy pts. (HIV+ and HIV-) of whom 54% were treated with UVB radiation, 38% with PUVA therapy (a photosenzitizng drug followed by UVA radiation), 5% with UVB+PUVA, and 3% with other UV therapies. Additional data were collected on 311 pts. known by the treating center to be HIV+. Among 68 pts., 84% had CD4+ counts in the 0-200 cells/mm3 range, 12% - in the 200-500 cells/mm3 range, and 4% had CD4+ counts >500 cells/mm3. More than 80% of HIV+ pts. received UVB and only 9% PUVA. Our data indicate substantial differences in indications for UV therapy between HIV- and HIV+ pts., as well as in the modalities used for these two categories of pts. Probably, the proportion of HIV+ UV therapy pts. determined by us (8.4%) is even higher considering that the HIV status of some patients is unknown.