Background: During an unpredictable situation (uncertain environment), high purchase intentions for better and quality services results providers need an extraordinary level of expertise in the healthcare market. Purpose: To determine the effect of customer-based brand equity on purchase intention. Method: observational study with cross-sectional design. The population was all elderly in the East Lombok Regency, samples that fulfilled the criteria; not experience chronic diseases such as stroke, cataracts, chronic kidney disease (CKD), severe diabetes mellitus, and coronary heart disease. Measurement of independence used the ADL Bartle Index instrument. The cognitive level used the MMSE instrument and respondents were willing to fill in the questionnaire. Results: the characteristics of respondents and customer-based brand equity on purchase intention used the chi-square test and fisher's exact test. Risk estimates and 95% confidence intervals of customer-based brand equity, namely brand awareness 1,243 (1,000 to 1,546), brand association 1,245 (1,014 to 1,527), perceived quality 1,229 (1,014 to 1,488), and brand loyalty 1,240 (1,039 to 1,479), the test results showed a significant relationship and had a prevalence ratio (PR)> 1 to the purchase intention of outpatient health centers. Conclusion: the majority of respondents who have an elderly purchase intention for outpatient services at the public health center.