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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 41-1917516

MAYO CLINIC

Also known as MAYO CLINIC AMBULANCE

Tax-exempt · ROCHESTER, MN 55903

Address and contacts

Address (IRS master file)
PO BOX 4007, ROCHESTER, MN 55903-4007
In care of
% CORPORATE TAX UNIT

What it must file and when

IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in December, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025December 31, 2025May 15, 2026Not on file
2024December 31, 2024May 15, 2025Not on file
2023December 31, 2023May 15, 2024Not on file

At risk of automatic revocation

None of the last three returns is in the IRS public files. The IRS revokes tax-exempt status after three consecutive years without a return. Recent filings can take a few weeks to appear.

File the 2025 990-EZ for MAYO CLINIC

Due May 15, 2026 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
41-1917516
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (509(a)(2))
Exempt since
2014
Accounting year ends
December
Files
Form 990 or 990-EZ
Category (NTEE)
Health care (E21)
Group exemption
5983: MAYO CLINIC

Filing history

No e-filed return or e-Postcard in the IRS public files.

990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 41-1917516).

Questions about MAYO CLINIC

What is the EIN of MAYO CLINIC?
The employer identification number (EIN) of MAYO CLINIC is 41-1917516.
Is MAYO CLINIC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2014.
Which annual return does MAYO CLINIC file?
Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
When is the next return of MAYO CLINIC due?
The return for tax year 2025 (the year ending December 31, 2025) is due May 15, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
When did MAYO CLINIC last file with the IRS?
There is no e-filed return or e-Postcard for it in the IRS public files.

Other nonprofits in ROCHESTER

All nonprofits in ROCHESTER · Minnesota · Health care