R. Lawrence Siegel, M.D., Ph.D. R. Lawrence Siegel, M.D., Ph.D. - Your Tampa Allergist. We are pleased to have you as our patient and look forward to a long and happy relationship. We strive to provide both pediatric and adult patients with quality care in a friendly, relaxed environment without lengthy waiting.Contact Us‧Insurance & Fees‧About Dr. Siegel‧Patient Forms‧Appointments.