Yes. Texas Adult Protective Services accepts anonymous reports through the statewide hotline at 1-800-252-5400 or online at the Texas Department of Family and Protective Services' reporting portal.
What to do next
Many family members and even facility staff hesitate to report a concern out of worry about retaliation or being drawn into a lengthy process, and anonymity is meant to remove that barrier. That said, providing your contact information when you're comfortable doing so does help investigators follow up with clarifying questions, which can make an investigation more effective -- it's a tradeoff worth weighing based on your specific comfort level, not a requirement either way. Whether anonymous or not, providing specific dates, names and observed details, rather than a general impression, meaningfully helps the investigation.