Does FMLA cover substance abuse treatment?

Yes, but only the time spent receiving treatment from a health care provider qualifies as FMLA leave.
Absences caused by substance use itself are not covered. Employees may still face disciplinary action for violating workplace substance abuse policies, even if they are on FMLA leave, as long as the policy is applied consistently to all employees.
For more information, visit the State of Tennessee Attendance and Leave Manual.