Rehab, Employment, and FMLA

Who meets the usual FMLA eligibility thresholds?

The usual employee requirements are at least 12 months with the employer, at least 1,250 hours worked in the preceding 12 months, and a worksite where that employer has at least 50 employees within 75 miles. The employer must be covered. Special rules apply to some workers, including airline flight crews and many federal employees.

For a qualifying serious health condition, eligible employees generally have up to 12 workweeks of FMLA leave in a 12-month period. This is unpaid leave with job protection and continued group health coverage under the applicable terms. The remaining entitlement depends on leave already used.

DOL distinguishes treatment by, or on referral from, a health care provider from absence caused by substance use itself. The latter does not qualify merely because substance use is involved. FMLA also does not erase a consistently applied workplace substance policy.

Ask the leave administrator to evaluate your actual situation, including remote work, prior leave, employment history, and the employer's coverage. State leave laws and employer policies may offer other options.

What if treatment cannot wait?

Treatment can begin while your FMLA request is being reviewed. For leave you could not plan in advance, notify your employer as soon as possible and practical, following its normal call-in procedure unless unusual circumstances prevent you from doing so. You can give notice before the medical certification is ready; if your employer requests certification, it must give you at least 15 calendar days to provide it. Starting treatment does not by itself establish FMLA protection: you must meet the eligibility requirements, and the absence must qualify. For substance use, leave must be for qualifying treatment provided by a health care provider or on referral from one; absence caused by substance use itself does not qualify. Follow your employer's instructions about whom to notify.

What does FMLA say about substance use treatment?

The Department of Labor's guidance on leave for substance use treatment explains that qualifying leave concerns treatment provided by a health care provider or on referral by one. Absence because of substance use, rather than treatment, does not qualify on that basis. The guidance also explains that applicable, nondiscriminatory substance-use policies can still matter.

A program's name or an invoice alone does not settle eligibility. A treating professional and the leave administrator have different roles in the process.

How much does an employer need to know?

For FMLA leave, you do not have to disclose your diagnosis or full medical history. You must give the employer enough information to recognize that the absence may qualify. If medical certification is required, it needs sufficient medical facts explaining the need for leave, when the condition began, its expected duration, and how it affects your ability to work. Intermittent leave also requires an estimate of the frequency and duration of absences. A complete certification does not have to name the diagnosis.

Ask HR or the leave administrator where to submit the paperwork.

One way to open the conversation: "I need to request leave under the FMLA for a serious health condition. My provider can complete the certification form. Which form do you use, who should receive it, and what is the deadline?" You do not have to give a diagnosis, but you must give your employer enough information to determine whether the leave may qualify.

Your direct supervisor may not contact your health care provider to clarify the certification. FMLA medical records must generally be kept confidential and separately from ordinary personnel files. Fitness-for-duty, accommodation, or professional-licensing processes may involve separate requirements. HHS's guidance on employers and health information explains the distinction.

Health information held by a provider or plan and information held in employment records can be governed differently. A broad claim that "HIPAA covers everything at work" is not accurate.

The rehab confidentiality guide provides a broader record-privacy overview.

The leave administrator can identify the required form and the appropriate recipient for medical documentation, while the manager receives scheduling information.

What should you clarify before taking leave?

Leave planning needs the applicable eligibility decision, required documentation, notice process, payment arrangements, and return-to-work requirements. Job protection and wage replacement are different benefits.

A practical leave calendar lists the request date, certification deadline, expected absence, and return review. The employee also needs to know how health-plan premiums and any available paid leave will be handled. For recurring appointments, the schedule should identify their frequency and expected duration. The completed paperwork and employer response create a record of the agreed arrangement before treatment disrupts the workday. You should not have to explain every clinical detail to every colleague.

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How do you plan the return to work?

The return plan connects ongoing appointments and clinical needs with the duties being resumed. The employer's process identifies required documentation, including any applicable fitness-for-duty certification. A reduced schedule or other arrangement depends on the relevant leave, accommodation, and workplace rules.

If work access during treatment is being considered, confirm that it fits both the care plan and the leave or benefits arrangement. A program allowing a laptop does not answer those questions.

See working while in rehab and professional responsibilities for the related planning guides.

What if FMLA is unavailable or insufficient?

Other possible routes include state leave rights, employer leave, disability benefits, and reasonable accommodation where applicable. Each has its own rules. Wage replacement and job protection are distinct benefits with their own eligibility rules.

Disability accommodation rules distinguish among circumstances involving treatment, recovery, lawful medication, and current illegal drug use. Individual advice is necessary where these rules affect a leave or return-to-work decision.

The EEOC's guidance on opioid use and employment covers the topic in detail. That guidance should not be generalized to every situation without reviewing the facts.

Questions about rehab, employment, and FMLA

Sources and further reading

• HHS: Employers and Health Information
• Department of Labor: Family and Medical Leave
• Department of Labor: Leave for Substance Use Treatment
• EEOC: Opioid Use and Employment
• DOL: Family and Medical Leave eligibility and protections
• Department of Labor: Employee Notice for FMLA Leave
• Department of Labor: Certification of a Serious Health Condition
• DOL: Family caregivers and FMLA
• DOL: Adult children under FMLA, Fact Sheet 28K
• DOL: FMLA leave to care for a parent, Fact Sheet 28C

Sources checked September 8, 2026