Medical Billing and Collections Company Comprehensive Medical Strategies Group is a medical billing and collections service that understands the special needs of today's medical providers. With more than 30 years of experience, latest technology, and a highly qualified team, you can feel confident about your billing and collections being managed by CMSG. Our objective is to provide distinctive quality and exceptional customer service as we strive to gain respect and trust of our clients and our partnering vendors. Our goal is to treat our clients with personalized attention of a small billing company with the support, expertise, and experience of a larger billing company.