OBJECTIVES: to obtain information on the cost of treatment (outpatient and inpatient care), including laboratory, drugs, medical supplies, consultation, Xray, room. METHODS: A crosssectional study was done to collect data in public hospital in East Java. Samples were 89 cases IDU with HIV, 49 of them received  inpatient care. Substitution for IDU was not included in the study. RESULTS: Increasing number of IDU and HIVAIDS cases in Indonesia (one province with high cases is East Java) has lead the policy-makers to provide subsidy for people living with HIVAIDS. Little is known about the cost of treatment in hospital. It is important for both payer and hospital to understand how best the provider payment scheme to provide services for PLHIV.  The study revealed that most of them were men, at productive age, and come from both urban and rural area. Only 25% of them has less than 3 diagnosis (opportunistic infection), and the rest are having more than 3 diagnosis. The top three cases were Lung disorder, GastroEnteritis and Candidiasis. Sixty-two% of them discharged with better condition, but 35% died. Average Length of stay was 9 days, and some of them were hospitalized more than one month. Average cost for inpatient care was USD 547 perday and outpatient care was USD 61 for one visit. Medical exam, drugs and hotel costs were having highest proportion. This situation was hard for the poor while  hospital felt total costs were not sufficiently covered by government financing scheme for the poor. CONCLUSIONS: Cost of tretament for PLHIV is high and in the future become serious burden for both payer and provider. Payment to provider should consider the cost of tretament.