Question 1

Is Isth a tax-exempt 501(c)(3)?

Accepted Answer

Yes — Isth is recognised by the IRS as a 501(c)(3) organisation (EIN 23-7428305). The IRS recognised Isth as tax-exempt in January 1975.

Question 2

What is Isth's EIN?

Accepted Answer

Isth's Employer Identification Number (EIN) is 23-7428305. The EIN was assigned by the IRS in January 1975. Donors and grantmakers use the EIN to verify tax-exempt status with the IRS.

Question 3

What does Isth do?

Accepted Answer

To further research & education on the major disease of thrombosis and disorders of haemostasis.

Question 4

Where is Isth located?

Accepted Answer

Isth is located at 301 S Mcdowell Street STE 125 1996, Charlotte, NC, 28202.

Question 5

When was Isth founded or recognised by the IRS?

Accepted Answer

Isth was recognised by the IRS as a tax-exempt organisation in January 1975. The IRS ruling date is the earliest authoritative date available for most US nonprofits.

Question 6

What is Isth's annual revenue?

Accepted Answer

On its most recent Form 990 (fiscal year 2025), Isth reported $12.8M in total revenue and $11.9M in total expenses.

Question 7

Has Isth been auto-revoked by the IRS?

Accepted Answer

No — Isth (EIN 23-7428305) 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 Isth listed in IRS Publication 78?

Accepted Answer

Yes — Isth 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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Isth

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