Sigma Mental Health Urgent Care is an urgent care provider located in San Antonio, Texas at 18587 Sigma Rd. The clinic provides care of a wide range of non-emergency conditions, including flu and strep throat, sprains and broken bones, vomiting, persistent diarrhea, abdominal pain, rashes, as well as cuts, bruises and insect bites. Like most urgent care clinics, Sigma Mental Health Urgent Care accepts walk-in patients. However, calling ahead or booking an appointment online can reduce your appointment wait time. While many health insurance plans cover urgent care, we strongly encourage you to confirm that the clinic is in-network with your insurance. In particular, not all clinics accept Medicare/Medicaid/TriCare.