Skip to content
Nonprofiteer
← All organizations

MAYO CLINIC

EIN 41-6011702 ROCHESTER, MN

Revenue 2024
$7,929,118,794
Expenses 2024
$6,313,480,074

Program services were 93.6% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
E21
Classification
2800
Street
PO BOX 4007

These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).

Group exemption

The central organization of an IRS group exemption (group number 5983), covering 18 subordinate organizations. matched by us

The IRS lists each organization's group exemption number; we match a subordinate to its central organization by that number and the affiliation code the IRS assigns.

All 18 subordinates →

Officers and directors · 2024

As listed in Part VII of the 2024 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • FARRUGIA MD GIANRICO

    TRUSTEE/PRESIDENT/CEO

    Total calculated
    $4,888,096
    From this org
    $0
    From related orgs
    $4,822,235
    Other
    $65,861
    Hours/week
    1 + 40 related

    Schedule J breakdown matched by us

    Base
    $0 + $3,922,824 related
    Bonus
    $0
    Other
    $0 + $899,411 related
    Deferred
    $0 + $13,839 related
    Nontaxable benefits
    $0 + $52,022 related
    Filer's total
    $0 + $4,888,096 related

  • THIELEN MD KENT R

    TRUSTEE/VP

    Total calculated
    $3,206,799
    From this org
    $0
    From related orgs
    $3,113,840
    Other
    $92,959
    Hours/week
    1 + 40 related

    Schedule J breakdown matched by us

    Base
    $0 + $2,605,119 related
    Bonus
    $0
    Other
    $0 + $508,721 related
    Deferred
    $0 + $50,365 related
    Nontaxable benefits
    $0 + $42,594 related
    Filer's total
    $0 + $3,206,799 related

  • GRAY MD RICHARD J

    TRUSTEE/VP

    Total calculated
    $3,202,023
    From this org
    $0
    From related orgs
    $3,110,824
    Other
    $91,199
    Hours/week
    1 + 40 related

    Schedule J breakdown matched by us

    Base
    $0 + $2,605,803 related
    Bonus
    $0
    Other
    $0 + $505,021 related
    Deferred
    $0 + $41,642 related
    Nontaxable benefits
    $0 + $49,557 related
    Filer's total
    $0 + $3,202,023 related

  • WILLIAMS MD AMY W

    TRUSTEE

    Total calculated
    $2,328,769
    From this org
    $0
    From related orgs
    $2,299,102
    Other
    $29,667
    Hours/week
    1 + 40 related

    Schedule J breakdown matched by us

    Base
    $0 + $1,932,789 related
    Bonus
    $0
    Other
    $0 + $366,313 related
    Deferred
    $0 + $10,475 related
    Nontaxable benefits
    $0 + $19,192 related
    Filer's total
    $0 + $2,328,769 related

  • ZORN CHRISTINA K

    TRUSTEE/VP

    Total calculated
    $2,169,564
    From this org
    $0
    From related orgs
    $2,087,648
    Other
    $81,916
    Hours/week
    1 + 40 related

    Schedule J breakdown matched by us

    Base
    $0 + $1,736,426 related
    Bonus
    $0
    Other
    $0 + $351,222 related
    Deferred
    $0 + $38,641 related
    Nontaxable benefits
    $0 + $43,275 related
    Filer's total
    $0 + $2,169,564 related

  • DAHLEN DENNIS E

    CFO

    Total calculated
    $1,990,254
    From this org
    $0
    From related orgs
    $1,888,039
    Other
    $102,215
    Hours/week
    1 + 40 related

    Schedule J breakdown matched by us

    Base
    $0 + $1,650,230 related
    Bonus
    $0
    Other
    $0 + $237,809 related
    Deferred
    $0 + $59,561 related
    Nontaxable benefits
    $0 + $42,654 related
    Filer's total
    $0 + $1,990,254 related

  • MURPHY JOSHUA B

    SECY

    Total calculated
    $1,838,681
    From this org
    $0
    From related orgs
    $1,785,340
    Other
    $53,341
    Hours/week
    1 + 40 related

    Schedule J breakdown matched by us

    Base
    $0 + $1,490,637 related
    Bonus
    $0
    Other
    $0 + $294,703 related
    Deferred
    $0 + $10,350 related
    Nontaxable benefits
    $0 + $42,991 related
    Filer's total
    $0 + $1,838,681 related

  • GORMAN PAUL A

    TREASURER

    Total calculated
    $1,748,824
    From this org
    $0
    From related orgs
    $1,655,287
    Other
    $93,537
    Hours/week
    1 + 40 related

    Schedule J breakdown matched by us

    Base
    $0 + $898,734 related
    Bonus
    $0 + $596,453 related
    Other
    $0 + $160,100 related
    Deferred
    $0 + $56,346 related
    Nontaxable benefits
    $0 + $37,191 related
    Filer's total
    $0 + $1,748,824 related

  • LANZINO MD GIUSEPPE

    PHYSICIAN

    Total calculated
    $1,642,488
    From this org
    $1,554,724
    From related orgs
    $0
    Other
    $87,764
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $1,288,759
    Bonus
    $0
    Other
    $265,965
    Deferred
    $47,696
    Nontaxable benefits
    $40,068
    Filer's total
    $1,642,488

  • GORES MD GREGORY J

    FORMER KEY EMPLOYEE

    Total calculated
    $1,639,409
    From this org
    $1,589,132
    From related orgs
    $0
    Other
    $50,277
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $1,244,066
    Bonus
    $0
    Other
    $345,066
    Deferred
    $16,992
    Nontaxable benefits
    $33,285
    Filer's total
    $1,639,409

  • KRAUSS MD WILLIAM E

    PHYSICIAN

    Total calculated
    $1,623,096
    From this org
    $1,576,058
    From related orgs
    $0
    Other
    $47,038
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $1,304,095
    Bonus
    $0
    Other
    $271,963
    Deferred
    $13,813
    Nontaxable benefits
    $33,225
    Filer's total
    $1,623,096

  • CLARKE MD MICHELLE J

    PHYSICIAN

    Total calculated
    $1,566,100
    From this org
    $1,495,190
    From related orgs
    $0
    Other
    $70,910
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $1,293,283
    Bonus
    $0
    Other
    $201,907
    Deferred
    $30,843
    Nontaxable benefits
    $40,067
    Filer's total
    $1,566,100

  • MARSH MD W RICHARD

    DIR-SPINE CENTER

    Total calculated
    $1,525,901
    From this org
    $1,479,544
    From related orgs
    $0
    Other
    $46,357
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $1,211,518
    Bonus
    $0
    Other
    $268,026
    Deferred
    $13,805
    Nontaxable benefits
    $32,552
    Filer's total
    $1,525,901

  • SPINNER MD ROBERT J

    PHYSICIAN

    Total calculated
    $1,512,256
    From this org
    $1,414,774
    From related orgs
    $0
    Other
    $97,482
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $1,175,282
    Bonus
    $0
    Other
    $239,492
    Deferred
    $58,260
    Nontaxable benefits
    $39,222
    Filer's total
    $1,512,256

  • SHAH MD VIJAY

    EXECUTIVE DEAN OF RESEARCH

    Total calculated
    $1,276,696
    From this org
    $1,193,147
    From related orgs
    $0
    Other
    $83,549
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $1,049,538
    Bonus
    $0
    Other
    $143,609
    Deferred
    $44,857
    Nontaxable benefits
    $38,692
    Filer's total
    $1,276,696

  • MENKOSKY PAULA E

    FORMER OFFICER

    Total calculated
    $1,262,312
    From this org
    $0
    From related orgs
    $1,172,237
    Other
    $90,075
    Hours/week
    0 + 40 related

    Schedule J breakdown matched by us

    Base
    $0 + $1,003,291 related
    Bonus
    $0
    Other
    $0 + $168,946 related
    Deferred
    $0 + $52,154 related
    Nontaxable benefits
    $0 + $37,921 related
    Filer's total
    $0 + $1,262,312 related

  • OTLEY MD CLARK C

    FORMER KEY EMPLOYEE

    Total calculated
    $1,234,721
    From this org
    $1,155,205
    From related orgs
    $0
    Other
    $79,516
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $952,106
    Bonus
    $0
    Other
    $203,099
    Deferred
    $48,659
    Nontaxable benefits
    $30,857
    Filer's total
    $1,234,721

  • WILLIAMSON MARY J

    CAO-MCS

    Total calculated
    $1,197,596
    From this org
    $1,146,092
    From related orgs
    $0
    Other
    $51,504
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $966,710
    Bonus
    $0
    Other
    $179,382
    Deferred
    $13,837
    Nontaxable benefits
    $37,667
    Filer's total
    $1,197,596

  • MORICE MD WILLIAM G

    CEO-MCS

    Total calculated
    $1,155,779
    From this org
    $1,068,576
    From related orgs
    $0
    Other
    $87,203
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $917,658
    Bonus
    $0
    Other
    $150,918
    Deferred
    $49,893
    Nontaxable benefits
    $37,310
    Filer's total
    $1,155,779

  • AMMASH MD NASER M

    FORMER KEY EMPLOYEE

    Total calculated
    $1,150,023
    From this org
    $773,838
    From related orgs
    $300,518
    Other
    $75,667
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $441,208 + $143,104 related
    Bonus
    $0
    Other
    $332,630 + $157,414 related
    Deferred
    $6,900 + $52,648 related
    Nontaxable benefits
    $9,413 + $6,706 related
    Filer's total
    $790,151 + $359,872 related

  • DIDEHBAN ROSHANAK

    TRUSTEE/ASST SECY

    Total calculated
    $1,145,919
    From this org
    $0
    From related orgs
    $1,099,206
    Other
    $46,713
    Hours/week
    1 + 40 related

    Schedule J breakdown matched by us

    Base
    $0 + $962,089 related
    Bonus
    $0
    Other
    $0 + $137,117 related
    Deferred
    $0 + $29,088 related
    Nontaxable benefits
    $0 + $17,625 related
    Filer's total
    $0 + $1,145,919 related

  • ARNETT JENNIFER P

    CHIEF DEVELOPMENT OFFICER

    Total calculated
    $1,145,219
    From this org
    $1,057,222
    From related orgs
    $0
    Other
    $87,997
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $964,933
    Bonus
    $0
    Other
    $92,289
    Deferred
    $60,581
    Nontaxable benefits
    $27,416
    Filer's total
    $1,145,219

  • RIHAL MD CHARANJIT S

    TRUSTEE

    Total calculated
    $1,102,038
    From this org
    $1,021,863
    From related orgs
    $0
    Other
    $80,175
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $823,562
    Bonus
    $0
    Other
    $198,301
    Deferred
    $43,209
    Nontaxable benefits
    $36,966
    Filer's total
    $1,102,038

  • CALLSTROM MD MATTHEW R

    TRUSTEE

    Total calculated
    $1,060,956
    From this org
    $972,259
    From related orgs
    $0
    Other
    $88,697
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $809,054
    Bonus
    $0
    Other
    $163,205
    Deferred
    $59,579
    Nontaxable benefits
    $29,118
    Filer's total
    $1,060,956

  • PAGNANO MD MARK W

    PHYSICIAN

    Total calculated
    $1,036,830
    From this org
    $957,862
    From related orgs
    $0
    Other
    $78,968
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $800,373
    Bonus
    $0
    Other
    $157,489
    Deferred
    $42,252
    Nontaxable benefits
    $36,716
    Filer's total
    $1,036,830

The first 25 listed. Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead — compensation, contributions to benefit plans, and expense account — and the total sums those. A Schedule J breakdown is as filed: base pay, bonus, other, deferred compensation and nontaxable benefits from this organization, with any from related organizations beside each, and the filer's own total. It is shown with the Part VII listing of the same name on the same return. The form gives no key between the two, so that pairing is ours, and is marked matched by us. Earlier years are each on their own filing page.

Filings

  • 2024
    Revenue
    $7,929,118,794
    Expenses
    $6,313,480,074
    Contributions
    $2,862,668,927
    Grants paid
    $607,369,592
  • 2023
    Revenue
    $7,424,970,925
    Expenses
    $6,179,398,335
    Contributions
    $3,328,764,626
    Grants paid
    $937,924,597
  • 2022
    Revenue
    $7,075,354,210
    Expenses
    $5,677,955,626
    Contributions
    $2,389,724,888
    Grants paid
    $323,566,414

The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.

Other returns filed

  • 2024 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported

  • 2023 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported

  • 2022 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported

Nonprofiteer parses the Form 990 only. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all.

Grants made

The 10 largest by cash amount. The API serves every itemized grant.

Where these grants went next →

Grants received

The 10 largest by cash amount. The API serves every itemized grant.

Related organizations

From Schedule R Part II, where a filer lists the tax-exempt organizations it is related to by control. It does not record shared board members or money.

Declared on its 2024 return

Declared as related by

Other IRS files

Auto-Revocation List

Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.

Publication 78

Listed as of 10 September 2026, under deductibility GROUP.

These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.