• Quest Diagnostics average operating margin for 2023 was 12.73%, a 30.13% increase from 2022.
• Quest Diagnostics average operating margin for 2022 was 18.22%, a 22.63% decline from 2021.
• Quest Diagnostics average operating margin for 2021 was 23.55%, a 35.58% decline from 2020.

Operating margin can be defined as operating margin measurement of what proportion of a company's revenue is left over after paying for variable costs of production such as wages, raw materials, etc.