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NCI's Cancer Information Service

Call 1-800-4-CANCER

(1-800-422-6237)
Mon - Fri
9 a.m. to 9 p.m. ET

Live Chat

LiveHelp
Mon - Fri
9 a.m. to 9 p.m. ET

Questions About Cancer?

NCI's Cancer Information Service (CIS) can help answer your cancer-related questions whether you are a patient, family or friend, health care provider, or researcher.  

Since 1975, we have been providing accurate, up-to-date, and reliable information that is easy to understand. CIS is a free and confidential service. Our trained information specialists provide personalized responses to a range of cancer topics, including: 

  • general cancer information
  • cancer prevention and screening
  • symptoms and risk factors
  • treatment
  • living and coping with cancer
  • finding cancer treatment
  • cancer research and clinical trials
  • questions about NCI and its programs

Help With Quitting Smoking? 

We know quitting smoking is hard. Staying quit can be even harder. Our trained smoking cessation counselors can help you prepare for your quit, manage cravings, deal with triggers, and provide you with support to see your quit through. Call 1-877-44U-QUIT (1-877-448-7848).


All services are available in English and Spanish, Monday through Friday, from 9 a.m. to 9 p.m. ET. 

Important: NCI provides cancer-related information for your general knowledge and is not a substitute for a doctor's advice.