For over 16 years, MDS has provided doctors with exceptional billing services. We pride ourselves in superior patient support, and our doctors continue to use us for our unparalleled reimbursement rates. MDS bills for Cardiologists, Chiropractors, Family Practitioners, Endocrinologists, Internal Medicine, Managed Care Practices, Neurologists, Pain Specialists, Physical Therapists, Podiatrists, Psychiatrists, and Walk-In Clinics.