Make An Appointment. Our clinic is open Monday - Thursday: (8:00 a.m. – 3:00 p.m.), Friday: (8:00 a.m. - 1:00 p.m.), Same day appointments are usually available for urgent or sudden illnesses, and we accept walk-ins as well. To make or change an appointment, please call our office at (281)-484-5587. Please note that our practice charges a $45 ....