How often must a CDL medical certificate be renewed?

A Commercial Driver's License (CDL) medical certificate must be renewed every two years. This requirement ensures that commercial drivers maintain a level of health that is conducive to safely operating large vehicles on public roads. The medical exam checks for various health factors that could affect a driver's ability to drive, such as vision, hearing, cardiovascular health, and other conditions that could impair driving.

The two-year renewal period is in place because it provides a balance: it is frequent enough to help catch any potential health concerns before they lead to accidents, but not so frequent that it places an undue burden on drivers. Certain conditions or circumstances could potentially require more frequent evaluations, such as a driver with an existing medical condition that may be monitored more closely. However, for most drivers, the general rule is the two-year renewal.