CDL medical certificates must be renewed every

• A. six months
• B. one year
• C. two years
• D. five years

Answer: (C)

A CDL medical certificate confirms you meet the medical standards to drive a commercial vehicle, and its standard validity is up to two years from the exam date. In most cases you’ll renew every two years. Some medical conditions or treatments can lead to a shorter expiration, requiring an earlier renewal, but the typical interval is two years.