How much does a Market Access Specialist I make in Saint Louis, MO? The average Market Access Specialist I salary in Saint Louis, MO is $74,456 as of September 01, 2024, but the range typically falls between $64,941 and $83,681. Salary ranges can vary widely depending on many important factors, including education, certifications, additional skills, the number of years you have spent in your profession. With more online, real-time compensation data than any other website, Salary.com helps you determine your exact pay target.