To fill out intermittent FMLA paperwork, notify your employer that you need leave, then have your healthcare provider complete Form WH-380-E (for your own condition) or WH-380-F (for a family member’s) with specific estimates of how often your absences will occur and how long each will last. You have 15 calendar days from your employer’s request to return the completed certification. The frequency and duration entries are what employers scrutinize most, so vague answers like “as needed” invite pushback. Everything below walks through the form fields, the notice rules, and what happens after you submit.
Confirm You Qualify Before Starting the Forms
Certification paperwork only matters if you’re eligible in the first place. FMLA covers you when you’ve worked for the employer at least 12 months, logged at least 1,250 hours in the 12 months before leave starts, and work at a site with 50 or more employees within 75 miles.1U.S. Department of Labor. Fact Sheet 28 – The Family and Medical Leave Act
Your condition also has to meet the FMLA definition of a “serious health condition” — inpatient care or continuing treatment by a healthcare provider.2eCFR. 29 CFR 825.113 – Serious Health Condition Common colds, seasonal flu, routine headaches, and standard dental problems don’t qualify. And intermittent leave specifically must be medically necessary: your provider has to establish that your condition genuinely requires time off in irregular increments rather than one continuous stretch.3eCFR. 29 CFR 825.202 – Intermittent Leave or Reduced Leave Schedule If you’re unsure, ask your doctor before you start the paperwork whether the certification will hold up.
Pick the Right Form
The Department of Labor publishes optional-use certification forms that most employers adopt or mirror. For intermittent leave tied to a medical condition, you’ll deal with two:
- WH-380-E, Certification of Health Care Provider for Employee’s Serious Health Condition, when the leave is for your own condition.
- WH-380-F, Certification of Health Care Provider for Family Member’s Serious Health Condition, when you’re caring for a spouse, child, or parent.
Your employer may use its own version, but it can only ask for the information the FMLA regulations authorize — no extra medical questions beyond what the certification covers.4U.S. Department of Labor. FMLA Forms Download the official forms from the DOL or get them from HR. Military-related FMLA uses different forms (WH-384 for qualifying exigency; WH-385 or WH-385-V for military caregiver leave), which follow a similar structure.
Notify Your Employer First
Before you touch the certification, tell your employer you need FMLA leave. Written or verbal notice to your supervisor or HR is enough to start the process, as long as it identifies the qualifying reason and expected timing.
If your intermittent leave is foreseeable (scheduled treatments, planned surgery, recurring therapy), give at least 30 days’ advance notice. When 30 days isn’t possible, notify as soon as practicable.5eCFR. 29 CFR 825.302 – Employee Notice Requirements for Foreseeable FMLA Leave For unforeseeable absences like flare-ups, notify as soon as possible — same day or next business day — and follow your employer’s normal call-in procedures. Skipping the call-in process without a good reason lets your employer delay FMLA coverage for the period you didn’t comply.6U.S. Department of Labor. Fact Sheet 28E – Requesting Leave Under the Family and Medical Leave Act
Complete Your Portion of the Certification
The top of WH-380-E or WH-380-F asks for basic identifying information: your name, the name of the person with the serious health condition, and the reason for the leave request. Fill this in completely before handing the form to your provider. Make sure names match what’s on file with your employer, and add your job title or department if the form asks.
Give your provider a written summary of your essential job duties along with the form. That helps them address whether your condition prevents you from performing your work, which is one of the things the certification asks them to assess.
What Your Healthcare Provider Needs to Document
The provider’s section is where intermittent leave certifications live or die. Your provider needs to address each of the following clearly:
- Diagnosis, date of onset, and expected duration of the condition.
- A clear statement that the condition requires treatment or causes flare-ups on an intermittent basis rather than requiring one continuous absence.
- Estimated frequency of episodes or appointments — for example, two to three times per month.
- Estimated duration of each episode — for example, one to two days per flare-up.
- Whether a reduced schedule is medically necessary, and if so, the expected hours per day or week.
Frequency and duration are the entries employers scrutinize most closely. Answers like “varies” or “as needed” invite follow-up requests and delays. Work with your provider on realistic ranges. A certification stating “migraine episodes estimated 2–4 times per month, lasting 1–2 days each” gives your employer actionable information and is far harder to challenge than “periodic episodes of unknown frequency.”7U.S. Department of Labor. Fact Sheet 28G – Medical Certification Under the Family and Medical Leave Act
Check every applicable field before you submit. An incomplete form gives your employer grounds to send it back and restart the clock. Typed responses are safer than handwriting; if handwritten, they need to be legible.
Return the Form Within 15 Calendar Days
Once your employer requests certification, you have 15 calendar days to return it. The deadline is firm. For foreseeable leave, missing it without good reason lets your employer deny FMLA protection for each day of leave taken between the deadline and the day you finally provide the form.8eCFR. 29 CFR 825.305 – Certification, General Rule For unforeseeable leave, your employer can deny coverage for the entire requested leave if the certification doesn’t arrive within 15 days, absent circumstances that made compliance genuinely impracticable.9eCFR. 29 CFR 825.313 – Failure to Provide Certification
The biggest practical risk is a provider’s office that sits on the form. Schedule time with your doctor to complete it, hand-deliver if possible, and follow up before day 10. Losing FMLA protection because a provider’s office was slow with paperwork is avoidable, but only if you push.
If Your Certification Is Incomplete or Insufficient
If your employer determines the certification has missing entries or vague, non-responsive answers, they must tell you in writing exactly what’s deficient. You then have seven calendar days to cure the problems. If you don’t, they can deny the leave.8eCFR. 29 CFR 825.305 – Certification, General Rule Filling the form out thoroughly the first time avoids a cure cycle that can push leave approval back by weeks.
What Happens After You Submit
Your employer has two notices to send you, each within five business days:
- Form WH-381, Notice of Eligibility and Rights & Responsibilities, which tells you whether you’re eligible and spells out obligations such as certification, paid leave substitution, and call-in procedures for each absence.10U.S. Department of Labor. Notice of Eligibility and Rights and Responsibilities
- Form WH-382, Designation Notice, which confirms whether the leave is approved as FMLA-qualifying and how much of your 12-week entitlement it will count against.11eCFR. 29 CFR 825.300 – Employer Notice Requirements
Keep copies of everything you submit and everything your employer sends back. If a dispute arises later over whether a particular absence was FMLA-protected, your paper trail is the defense. Submit forms through whatever channel your employer specifies — HR, a leave administrator, an online portal — and confirm receipt.
Second Opinions and Clarification Calls
Your employer can’t reject a complete certification because they don’t like the answers, but they have two options if they doubt its validity. First, they can require a second opinion at their expense, from a provider they don’t regularly employ or contract with. If the two opinions conflict, a third opinion from a jointly chosen provider is final and binding, also at the employer’s expense. While waiting for a second opinion, you’re provisionally entitled to FMLA benefits.12eCFR. 29 CFR 825.307 – Authentication and Clarification of Medical Certification; Second and Third Opinions
Second, an HR professional, leave administrator, or other management official can contact your provider to clarify handwriting or the meaning of a response. Your direct supervisor is prohibited from making that contact, and the employer can’t ask for additional medical information beyond what the certification requires. If you refuse to authorize your provider to discuss the certification and don’t clarify the issue yourself, your employer can deny the leave.12eCFR. 29 CFR 825.307 – Authentication and Clarification of Medical Certification; Second and Third Opinions
Plan for Recertification
The initial certification isn’t your last FMLA paperwork. For ongoing conditions, your employer can request recertification periodically:
- For conditions lasting 30 days or less, recertification can be requested no more often than every 30 days, and only in connection with an absence.
- For conditions lasting more than 30 days, the employer must wait until the minimum duration stated in your certification has passed, but can always request recertification at least every six months in connection with an absence.
- For conditions lasting longer than a year, the employer can require a brand-new certification at the start of each leave year.
Your employer can ask for recertification sooner in three situations: you request an extension of leave, the circumstances in your certification change significantly, or the employer receives information casting doubt on your stated reason for absence.13U.S. Department of Labor. FMLA Frequently Asked Questions For a chronic condition, talk to your provider in advance about updating the paperwork so you’re not scrambling when the request lands.