To update your PhilHealth ID card details, you need to visit the nearest PhilHealth office or access their online services. Bring any required documents that support your update, such as identification or proof of change in personal information. It's essential to complete the necessary forms provided by PhilHealth. For specific instructions and to check if online updates are available, visit the official PhilHealth website. If you're uncertain about the process, consider reaching out to their customer service for assistance.