General support
UnrestrictedKeeps the whole site free, ad-free, maintained, hosted, and available to readers.
Transparency & Governance
Cancer Explained is a project of National Cancer Information Foundation, a Wyoming public benefit nonprofit corporation created to provide free plain-language cancer education and public health information.
Organization details
| Legal Name | National Cancer Information Foundation |
|---|---|
| Public Project | Cancer Explained |
| EIN | 42-3639534 |
| Entity Type | Wyoming public benefit nonprofit corporation |
| Incorporated | July 6, 2026 |
| Federal Tax-Exempt Status | 501(c)(3) — recognized by the IRS |
| Determination Letter | IRS Letter 947, dated July 13, 2026 |
| Exemption Effective Date | July 7, 2026 |
| Public Charity Classification | Section 170(b)(1)(A)(vi) |
| Accounting Period Ends | December 31 |
| Current Status | Active — recognized 501(c)(3) tax-exempt public charity |
| Mission | Free cancer education and patient/caregiver resources |
IRS determination
On July 13, 2026, the IRS recognized National Cancer Information Foundation as tax-exempt under Section 501(c)(3) of the Internal Revenue Code, effective July 7, 2026. National Cancer Information Foundation is classified as a public charity — not a private foundation — under Section 170(b)(1)(A)(vi). EIN 42-3639534.
Read the IRS determination letter (PDF, 0.7 MB)
This is IRS Letter 947, dated July 13, 2026. It shows the effective date of exemption (July 7, 2026), the public-charity classification, and EIN 42-3639534 — the same facts stated above, in the IRS’s own words.
Governance
National Cancer Information Foundation is governed by a board of directors and maintains internal bylaws, conflict-of-interest policies, and corporate records. We will publish additional governance and financial transparency information as the organization grows and as required filings become available.
We do not publish personal addresses, personal contact information, or internal board records on this website. Official filings and required public documents will be made available as appropriate.
Funding & editorial independence
Where our money comes from, the firewall that keeps funders away from editorial decisions, which gifts we decline, and our annual funder disclosure commitment are all documented on our editorial independence & funding policy page. Donations of any kind — including gifts made in honor or in memory of someone — follow the same policies.
Donation accountability
Donors may tell us which part of the mission matters most to them. Unless we separately accept a legally restricted gift in writing, donations are treated as unrestricted support for Cancer Explained’s charitable and educational work. This avoids promising restricted accounting that the organization has not formally accepted.
How gifts may be directed
Unless National Cancer Information Foundation separately accepts a legally restricted gift in writing, donations are treated as unrestricted support for Cancer Explained's charitable and educational work. Program choices or notes from donors are recorded as preferences when possible, not binding restrictions.
Library
Donor preferenceSupports maintenance of explainers, glossary entries, question pages, and printable education.
Source review
Donor preferenceSupports citation checks, QA scripts, correction handling, and reviewer coordination.
Global access
Donor preferenceSupports language access, low-bandwidth work, offline resources, and translation review.
Tools
Donor preferenceSupports educational tools that help readers prepare questions and find a place to start.
Tribute gifts
UnrestrictedHonors or remembers someone while supporting free cancer education for everyone.
Ongoing transparency
The IRS determination letter is published on this page. We will publish our annual filings and impact updates here as they become available.
Contact
Questions about the organization? Email us at info@cancerexplained.org. You can also read our about page, privacy policy, and terms of use.