Question 1

Is Coffin-Siris Syndrome Foundation a tax-exempt 501(c)(3)?

Accepted Answer

Yes — Coffin-Siris Syndrome Foundation is recognised by the IRS as a 501(c)(3) organisation (EIN 82-2116961). The IRS recognised Coffin-Siris Syndrome Foundation as tax-exempt in February 2018.

Question 2

What is Coffin-Siris Syndrome Foundation's EIN?

Accepted Answer

Coffin-Siris Syndrome Foundation's Employer Identification Number (EIN) is 82-2116961. The EIN was assigned by the IRS in February 2018. Donors and grantmakers use the EIN to verify tax-exempt status with the IRS.

Question 3

What does Coffin-Siris Syndrome Foundation do?

Accepted Answer

Our mission is to support connect and inform the Coffin-Siris Syndrome community as well as promote and fund CSS-related research.

Question 4

Where is Coffin-Siris Syndrome Foundation located?

Accepted Answer

Coffin-Siris Syndrome Foundation is located at 11611 106th Ave NE, Kirkland, WA, 98034.

Question 5

When was Coffin-Siris Syndrome Foundation founded or recognised by the IRS?

Accepted Answer

Coffin-Siris Syndrome Foundation was recognised by the IRS as a tax-exempt organisation in February 2018. The IRS ruling date is the earliest authoritative date available for most US nonprofits.

Question 6

What is Coffin-Siris Syndrome Foundation's annual revenue?

Accepted Answer

On its most recent Form 990 (fiscal year 2025), Coffin-Siris Syndrome Foundation reported $151K in total revenue and $120K in total expenses.

Question 7

Has Coffin-Siris Syndrome Foundation been auto-revoked by the IRS?

Accepted Answer

No — Coffin-Siris Syndrome Foundation (EIN 82-2116961) does not appear on the IRS Auto-Revocation List. Givalgo Discover cross-references the IRS Auto-Revocation List on every profile load; if status changes, this page reflects it.

Question 8

Is Coffin-Siris Syndrome Foundation listed in IRS Publication 78?

Accepted Answer

Yes — Coffin-Siris Syndrome Foundation is listed in IRS Publication 78 as an organisation eligible to receive tax-deductible charitable contributions. Pub 78 status is the canonical IRS signal that donations to an org are deductible.

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Coffin-Siris Syndrome Foundation

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