Thank you for your question. In general, having a HIDA (Hepatobiliary Iminodiacetic Acid) scan a week after receiving dermal fillers should not pose any issues. Dermal fillers are typically localized treatments and do not usually interfere with systemic imaging studies such as a HIDA scan. The HIDA scan is designed to evaluate the function of your liver, gallbladder, bile ducts, and small intestine, and the presence of dermal fillers should not affect the results or the safety of the procedure. However, it's always best to inform your healthcare provider about any recent procedures or treatments you have undergone. They can give you personalized advice and ensure that there are no specific contraindications in your case. If you have any other concerns or questions, please feel free to reach out.