What Can Your Employer Ask About Your Cancer in California, and Who Can It Tell?
You needed two days off for a scan, so you said why. Then the questions started: what stage? what is the prognosis? is it the kind that comes back? Or worse, no questions at all, just the discovery a week later that three people on your team already knew, and you told exactly one of them.
California draws that line much more tightly than most employers behave as though it does.
Labor Law PC was built by a lawyer who spent many years on the other side — defending companies in cases exactly like this one. We know the playbook employers run, and we use it only for employees, from our offices in Santa Monica and Palo Alto.
From Los Angeles to the Bay Area, we hear this most from small and mid-sized companies, where HR is one person and the manager who found out sets your schedule.
What Medical Questions Can a California Employer Legally Ask?
The rules change three times.
Before an offer, almost nothing is permitted. Government Code section 12940, subdivision (e)(1), makes it unlawful to require a medical examination of an applicant or to ask whether an applicant has a disability or medical condition. Under subdivision (e)(2), the employer may ask whether you can perform the job’s functions and may respond to your own request for accommodation.
After an offer but before you start, subdivision (e)(3) allows an examination only if it is “job-related and consistent with business necessity” and every entering employee in the same job classification goes through the same thing. California requires both. Federal law requires only the uniformity.
Once you are employed, subdivision (f) prohibits medical examinations and inquiries unless the employer can show them to be job-related and consistent with business necessity. The burden is on the employer, not on you.
Can My Employer Ask for My Diagnosis in California?
Not once you have given it the documentation it is entitled to.
Where your disability or your need for accommodation is not obvious, your employer may require reasonable medical documentation. After that, the regulation says the employer “shall not ask the applicant or employee about the underlying medical cause of the disability.” (Cal. Code Regs., tit. 2, section 11069, subdivision (c)(3).)
The same provision permits the employer to require medical information and “second opinions from other health care providers.” So your employer can keep asking what you can do and can require a second opinion, but it cannot keep digging into the diagnosis. Your limitations are fair game. Why you have them, once documented, is not.
Who Can Your Employer Tell About Your Medical Condition in California?
Very few people. The same regulation requires that medical information obtained during the interactive process “shall be maintained on separate forms, and in medical files separate from the employee’s personnel file, and shall be kept confidential.” There are three narrow exceptions: supervisors and managers “may be informed of restriction(s) on the work or duties of employees with disabilities and necessary reasonable accommodations”; first aid and safety personnel may be told, where appropriate, that the condition may require emergency treatment; and government officials investigating compliance may receive relevant information.
Read the first exception closely, because it is the one that gets abused. Your manager may be told you cannot lift more than twenty pounds and will be out on Thursdays. Nothing in that exception covers the diagnosis.
The Confidentiality of Medical Information Act points the same way. Civil Code section 56.20 bars an employer from using or disclosing an employee’s medical information without a signed authorization, subject to limited exceptions. Be realistic about what that is worth alone: the remedies in Civil Code sections 56.35 and 56.36 are modest, starting at $1,000 in nominal damages for a negligent release. What a breach carries is proof. An employer that circulated your diagnosis and then changed how it treated you has handed you one thing you would otherwise have to prove: that the decision-makers knew.
| If your diagnosis traveled further than it should have, that is worth a conversation. Call (877) 775-2267 for a free, confidential review. No fee unless we win. |
Signs Your Employer Has Gone Past What the Law Allows
- You are asked for your diagnosis or prognosis after already providing a note about your limitations
- Your medical paperwork sits in your personnel file, where anyone with access can read it
- A coworker mentions something you told only HR
- You are asked how much longer this will go on, or whether it is likely to come back
- You are told to sign a broad medical release to keep working
None of these means a claim exists. Every one means the boundary has moved, and that is worth documenting.
What to Do Today
- Write down who knew, and how you found out, with dates and names, and keep your requests and the responses in writing.
- Request your personnel file in writing. Under Labor Code section 1198.5, your employer has 30 calendar days to produce it, and a former employee gets one request a year.
A discrimination complaint generally goes to the Civil Rights Department within three years of the unlawful act, and a lawsuit within one year of your right-to-sue notice. Exceptions apply, so get your own dates checked.
Can my employer ask what my diagnosis is in California?
Not once you have given reasonable medical documentation. At that point the regulations bar asking about the underlying medical cause, though your employer may still require job-related medical information and a second opinion.
Is it illegal for my boss to tell coworkers about my medical condition in California?
Usually, yes. Medical information must be kept confidential and separate from your personnel file, and supervisors may be told only about work restrictions and accommodations, not the diagnosis. The remedies are modest on their own, but it can be proof that the people who later decided about you knew.
Can my employer require a doctor’s note for cancer treatment?
Yes, within limits. Where your need is not obvious and you have not already documented it, your employer may require reasonable medical documentation. It may not treat the note as an invitation to a broader inquiry into your diagnosis.
Does California protect me if cancer runs in my family?
Yes. Government Code section 12926 defines “genetic information” to include “the manifestation of a disease or disorder in family members of the individual,” so family medical history is protected in its own right. A known cancer-predisposing gene that is not yet producing symptoms is protected too, as a “genetic characteristic” within the definition of medical condition.
You Told Them Because You Had To. That Is Not Consent.
Telling one person for one purpose is not permission to circulate it, and asking for time off is not a waiver of your privacy. Call (877) 775-2267 or contact us online for a free, confidential consultation. Millions recovered. No fees unless we win. Hablamos Español.
This article is general information about California law as of September 2026 and is not legal advice about your situation. Reading it does not create an attorney-client relationship. Deadlines in employment matters are short and vary by claim.
