You are here

21st Century Oncology breach exposes patients’ info

Share this page

Have you received a letter from 21st Century Oncology warning that your personal information was exposed? 21st Century Oncology is a medical company. Many of the doctors who work with it practice under their own names or the names of medical groups. Some treat patients who are not cancer patients.

The company recently announced that a cyber intruder broke into a company database containing information about more than 2.2 million past and present patients, including patients’ names, Social Security numbers, physicians’ names, diagnoses, and treatment and insurance information.

The company recently sent patients letters about the breach that included an offer of one year of free credit protection services. Here are some things to know if you got a letter:

  • 21st Century Oncology has a webpage with information about the breach, and a link you can use to search for your doctor’s name. The company also has a hotline you can call to confirm that it sent the letter you received: 1-866-446-1405, from 9 a.m. to 9 p.m. Eastern time, Monday through Friday. You’ll be asked for your name, address, and telephone number when you call.
  • The company says that it will only notify you of the breach by postal mail. If you get an email or text message that says it’s from 21st Century Oncology or offering you credit protection in response to the breach, don’t reply, click on any links, or open any attachments. If you receive a call that is not in response to your call to the company, hang up.
  • If you enroll for free credit protection services, use the exact web address and personal “activation code” included in your letter. The company will not ask for a credit card number. You also can call the service provider, Experian, at 1-866-271-3084, with questions or to enroll by phone.

Whether you enroll online or by phone, you will be asked for your name, address, and Social Security number, and to answer some questions to verify your identity. The questions are based on information in your credit file.    

The FTC has more information about identity theft protection services, and steps you can take to deal with a data breach. If you believe you are a victim of identity theft, report it to the FTC at and get a free personalized, step-by-step recovery plan.


Unfortunately a form letter was sent with no Dr. name on it. Since I have not been to a cancer dr. I thought it was a scam. Never even heard of this company.

Thanks you very much. ...

Is anyone taking care of. If you click on a support on a web site and they are really hackers. that has happened to me 2 times with dell and hp. so be careful.

Yes, we have heard about this scam. This new blog post about an email hack has more.

Is this 21st letter a scam?

 A medical company called 21st Century Oncology sent paper mail letters to warn some people that their personal information was exposed. They did not send email or text messages.

If you got a paper mail letter from 21st Century Oncology and you want more information, you can go to this webpage with information about the breach. The page has a link you can use to search for your doctor’s name.

Or, you can call to ask about the letter. Call 1-866-446-1405, from 9 a.m. to 9 p.m. Eastern time, Monday through Friday. The operator will ask for your name, address, and telephone number.

This is very important. As a 64 year old human,I'd like to think I'm technology savvy. But,I'm not. What does"In God We Trust" have to do with identity theft?

I see these comments are dated from 2016. I just got a postcard regarding this subject. They say I am entitled to 'free credit monitoring' (asking for email). Also saying I can claim up to $20 per hour (max 2 hours) for my impacted time (asking for email associated with my PayPal account). Obviously, they are getting neither. Is this suit still active or is this a USPS scam? I have never seen an oncologist in Scottsdale, AZ.

Leave a Comment