Are second or third opinions allowed for military-related FMLA leave?

No. Second and third opinions cannot be required for:
•    A covered service member’s serious injury or illness, or
•    A qualifying military exigency.
However, designated personnel (such as a health care provider, HR professional, leave administrator, or management official)—but not the employee’s direct supervisor—may contact the certifying provider or listed entity to verify or clarify the information provided.
For more information, visit the State of Tennessee Attendance and Leave Manual.