In most cases, yes. Under the federal Americans with Disabilities Act (ADA), employers with 15 or more employees must provide reasonable accommodations to qualified workers with disabilities unless doing so would cause an "undue hardship." The Family and Medical Leave Act (FMLA) separately requires covered employers to grant eligible workers up to 12 weeks of job-protected leave for serious health conditions. Doctor's notes matter because they are how an employee documents the need for an accommodation or leave, but a note by itself does not automatically dictate what an employer must do.
These are some of the most misunderstood duties in the workplace, and failure-to-accommodate is one of the most common claims employees bring to the U.S. Equal Employment Opportunity Commission (EEOC). Here is how the federal baseline actually works, where state law often goes further, and the practical steps both sides should take.
Do employers have to accommodate disabilities?
Under the ADA, enforced by the EEOC, a covered employer must reasonably accommodate a qualified individual with a disability. "Qualified" means the person can perform the essential functions of the job with or without accommodation. A "disability" is broadly defined as a physical or mental impairment that substantially limits a major life activity, a record of such an impairment, or being regarded as having one.
A reasonable accommodation is a change to the job, the workplace, or how things are usually done that lets the employee perform their work. Common examples include:
- Modified schedules or shift changes
- Telework or remote work where the job allows it
- Leave beyond normal policy as an accommodation
- Ergonomic equipment, assistive technology, or accessible facilities
- Reassignment to a vacant position the employee is qualified for
- Adjusting non-essential job duties
The employer does not have to provide the exact accommodation the employee prefers, only an effective one. And it can deny a request that would cause undue hardship, meaning significant difficulty or expense judged against the employer's size and resources, or one that would remove an essential function of the job or create a genuine safety risk.
The interactive process
The ADA expects both sides to engage in a good-faith, back-and-forth conversation called the interactive process. Once an employee asks for a change at work for a medical reason, the employer should respond, ask any reasonable follow-up questions, request supporting documentation if the disability or need is not obvious, and work toward a solution. Employers that ignore a request or refuse to discuss options are the ones most likely to lose a failure-to-accommodate claim, even if the underlying request was debatable.
Magic words are not required. An employee does not have to say "ADA" or "reasonable accommodation." Telling a supervisor or HR that a medical condition is affecting their work and they need a change is usually enough to trigger the employer's duty to respond.
Do employers have to accept and accommodate doctor's notes?
This is where a lot of confusion happens. A doctor's note is evidence of a medical need, not a self-executing order. Here is the practical reality:
- Employers can generally require reasonable documentation. When a disability or the need for accommodation is not obvious, the ADA lets an employer ask for a note confirming the condition and the work-related limitation. Employers should not demand the full medical record or a specific diagnosis when a focused note about functional limits will do.
- A note does not bind the employer to a specific accommodation. If a doctor writes "must work from home," the employer must consider it, but it can offer a different effective accommodation, or deny remote work if in-person presence is genuinely an essential function.
- Employers cannot simply ignore a legitimate note. Brushing off credible medical documentation, or punishing someone for submitting it, is exactly the kind of conduct that leads to ADA or FMLA liability.
- Medical information must be kept confidential. The ADA requires employers to store medical documentation separately from the regular personnel file and limit who sees it.
For ordinary sick days outside the ADA or FMLA, whether an employer must accept a doctor's note is mostly a matter of company policy and, in some places, state or local paid sick leave laws. There is no general federal law guaranteeing paid sick leave, and these requirements vary by state and even by city.
Do employers have to approve FMLA?
If the legal requirements are met, yes, the employer must grant FMLA leave. The FMLA is enforced by the U.S. Department of Labor, Wage and Hour Division. It is not discretionary: an employer cannot deny qualifying leave just because it is inconvenient. The conditions are specific:
- Covered employer: private employers with 50 or more employees within a 75-mile radius, plus public agencies and schools.
- Eligible employee: has worked for the employer for at least 12 months, and for at least 1,250 hours in the 12 months before the leave.
- Qualifying reason: the employee's own serious health condition; caring for a spouse, child, or parent with a serious health condition; the birth or placement of a child; or certain military family needs.
Eligible workers get up to 12 weeks of unpaid, job-protected leave in a 12-month period (26 weeks for certain military caregiver leave). Job-protected means the employee generally returns to the same or an equivalent position with the same pay and benefits, and group health insurance continues during leave on the same terms.
The employer can require a medical certification from a health care provider to support the need for leave, and can ask for periodic recertification within legal limits. If the certification is incomplete or unclear, the employer must give the employee a chance to fix it before denying leave. FMLA leave can also be taken intermittently or on a reduced schedule when medically necessary.