Pay My Bill Pay My Bill at Preferred Dermatology Easily pay your Preferred Dermatology bills online with Preferred Dermatology. Secure, convenient, and fast payment options for all patients. For more information or to schedule an appointment, contact us today. We proudly serve patients from Allen, TX, Anna, TX, Celina, TX, Denton, TX, Forney, TX, Greenville, TX, Lewisville, TX, McKinney, TX, Rockwall, TX, Sherman, TX, Sulphur Springs, TX, and Waxahachie, TX, and surrounding areas. PAY NOW