With only a few walk-in clinics nearby, Little Alsace Urgent Care Center may be your best option for immediate care in Castroville. They are open today from 9:00am to 6:00pm, as well as 7 days a week. As long as you visit them during their business hours, you should be able to walk right into 1501 Houston St and be seen relatively quickly. The national average for patients waiting at an urgent care is between 15-30 minutes, so hopefully it shouldn't be too long of a wait.
If you are looking for additional options, you can check out Quality Urgent Care in San Antonio, which is about 12 miles away and CVS MinuteClinic in San Antonio, which is about 13 miles away. If you need a 24-hour option, you can always visit the closest emergency room, of course, you will likely pay 3-5 times more and have a much longer wait. In the case of a medical emergency, call 911.
As an urgent care center, Little Alsace Urgent Care Center specializes in the delivery of non-emergent healthcare conditions, including the treatment of most common injuries and illnesses including sprains and fractures, scrapes, cuts and burns, bites and stings, cold and flu symptoms, abdominal pain, nausea and vomiting, and much more. Additionally, urgent care centers provide both diagnostic and preventative care including well visits, annual physicals and immunizations like flu shots. Patients should typically expect to pay between $20-100 for routine visits and services and most clinics will accept major insurance plans, and of course self-pay patients with cash or a major credit card.