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Call 1-800-4-CANCER

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

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9 a.m. to 9 p.m. ET

The Cancer Information Service (CIS)

Information specialists at NCI’s Cancer Information Service (CIS), NCI's contact center, are available to help answer your cancer-related questions whether you are a patient, family member or friend, health care provider, or researcher. Our service is available in English and Spanish.

We provide accurate, up-to-date, and reliable information that is easy to understand and free of charge. Our trained information specialists provide personalized responses to a range of cancer questions, including:

  • tailored clinical trials searches
  • cancer research
  • how to find cancer treatment centers
  • cancer prevention and early detection
  • risk factors
  • symptoms
  • diagnosis and treatment
  • living with cancer
  • tissue donation
  • questions about NCI and its programs

CIS can also help you quit smoking. The Smoking Quitline number is 1-877-44U-QUIT (1-877-448-7848). The service is available in English and Spanish, Monday through Friday, 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.

The NCI Cancer Information Service

Questions about cancer or clinical trials? There's help available from NCI information specialists.

You can also reach us by mail:

Mailing Address

BG 9609 MSC 9760
9609 Medical Center Drive
Bethesda, MD 20892-9760