What a Medical Billing Specialist Does. They are in charge of making certain that billing compliance policies are always followed. To keep their knowledge and skills up to date and to maintain their talents current, medical billing professionals may also need to stay informed about shifting healthcare standards and legislation. In order to make sure that claims are handled properly and that payments are received on schedule, they also follow up with insurance providers. In conclusion, medical billing specialists play a critical role in the healthcare industry. In order to assure correct billing and reduce payment denials, they also keep patient records and stay current with changes in insurance policies, laws, and billing codes. What a Medical Billing Expert Does. Insurance claims preparation, submission, and follow-up are the duties of a medical billing specialist.