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INTERNATIONAL ATHEROSCLEROSIS SOCIETY

EIN 23-2099003 WASHINGTON, DC

Revenue 2024
$569,686
Expenses 2024
$704,259

Program services were 57.7% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
G43Z
Classification
2000
Street
2020 K ST NW STE 505

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).

Other organizations at this address

13 other organizations in the IRS Business Master File list the same street address. matched by us

This address is a suite or unit (STE 505). Organizations that share one are often clients of the same office-services firm, accountant or registered agent rather than related to each other.

We match the street line and ZIP code as the IRS gives them, ignoring case and outer spaces and nothing else, so "AVE" and "AVENUE" count as different streets and this list can miss some. A shared address can mean related organizations or a shared office, but it can also be a registered agent, a mail drop or a service provider holding mail for unrelated clients. It is not, by itself, evidence that two organizations are connected.

Mission and programs · 2024

Mission

TO PROMOTE, AT AN INTERNATIONAL LEVEL, THE ADVANCEMENT OF SCIENCE AND TEACHING RELATED TO THE FIELD OF ATHEROSCLEROSIS.

Activities or mission (Part I)

THE INTERNATIONAL ATHEROSCLEROSIS SOCIETY (THE SOCIETY) WAS ESTABLISHED ON NOVEMBER 29, 1978 TO PROMOTE THE SCIENTIFIC UNDERSTANDING OF THE ETIOLOGY, PREVENTION, AND TREATMENT OF ATHEROSCLEROSIS. THE IAS EXISTS TO COORDINATE GLOBALLY THE EXCHANGE OF SCIENTIFIC INFORMATION AMONG THE IAS CONSTITUENT SOCIETIES AND THE MEDICAL WORLD AT LARGE, TO FOSTER RESEARCH AND EDUCATION ON CARDIO-CEREBRO-METABOLIC AND THROMBOSIS RISK FACTORS INTO THE DEVELOPMENT OF ATHEROSCLEROSIS, AND TO HELP TRANSLATE THIS KNOWLEDGE INTO IMPROVING CLINICAL PRACTICE AND THE EFFECTIVENESS OF PROGRAMS DESIGNED TO PREVENT AND TREAT THIS DISEASE AMONG THE MEDICAL COMMUNITY AT LARGE.

  • DEVELOPMENT AND IMPLEMENTATION OF EDUCATIONAL PROGRAMS FOR RESEARCHERS AND CLINICIANS MADE AVAILABLE AND DELIVERED THROUGH MEETINGS BOTH LIVE AND ONLINE (E.G.: CONGRESSES, MASTERCLASSES, WEBINARS), NEWSLETTERS, EBLASTS, PUBLICATIONS, WEBSITES, DIRECT CORRESPONDENCE WITH THE MEMBER SOCIETIES, AND COORDINATION OF EXPERT PANELS AT INTERNATIONAL LEVEL.

    Expenses $387,822

  • FELLOWSHIP PROGRAM FOR VISITING SCIENTISTS UP TO 40 YEARS MADE AVAILABLE THROUGH INTERNATIONAL MEETINGS, NEWSLETTERS, AD-HOC EBLASTS, PUBLICATIONS, WEBSITES AND DIRECT CORRESPONDENCE WITH THE MEMBER SOCIETIES. PROCESSING OF FELLOWSHIP APPLICATIONS THROUGH AD-HOC SELECTING COMMITTEES, NOTIFICATION OF THE WINNERS, AWARDING OF GRANTS, COLLECTING FINAL RESEARCH RESULTS.

    Expenses $18,385 · Grants $18,385

As filed on the 2024 return.

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.

  • Peter Libby

    PRESIDENT

    Total calculated
    $8,000
    From this org
    $8,000
    From related orgs
    $0
    Other
    $0
    Hours/week
    4
  • Khalid Al-Rasadi

    SECRETARY

    Total calculated
    $0
    Hours/week
    1
  • Samia Mora

    TREASURER

    Total calculated
    $0
    Hours/week
    1
  • Dirk Blom

    PRESIDENT ELECT

    Total calculated
    $0
    Hours/week
    3
  • Raul Santos

    IMMEDIATE PAST PRESIDENT

    Total calculated
    $0
    Hours/week
    3
  • Michelle M D Winokur

    EXECUTIVE DIRECTOR

    Total calculated
    $0
    Hours/week
    40

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, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. Earlier years are each on their own filing page.

Filings

  • 2024
    Revenue
    $569,686
    Expenses
    $704,259
    Contributions
    $553,857
    Grants paid
    $18,385
  • 2023
    Revenue
    $691,360
    Expenses
    $696,866
    Contributions
    $691,360
    Grants paid
    $62,000
  • 2022
    Revenue
    $780,661
    Expenses
    $619,020
    Contributions
    $780,661
    Grants paid
    $0

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

  • 2021 · 990

    Revenue
    $795,356
    Expenses
    $671,693
    Assets (EOY)
    $522,027
  • 2020 · 990

    Revenue
    $561,054
    Expenses
    $534,287
    Assets (EOY)
    $414,724
  • 2019 · 990

    Revenue
    $461,885
    Expenses
    $663,886
    Assets (EOY)
    $365,226
  • 2018 · 990

    Revenue
    $352,878
    Expenses
    $680,489
    Assets (EOY)
    $527,095
  • 2017 · 990

    Revenue
    $402,292
    Expenses
    $465,903
    Assets (EOY)
    $898,181
  • 2016 · 990

    Revenue
    $486,300
    Expenses
    $338,245
    Assets (EOY)
    $995,809
  • 2015 · 990

    Revenue
    $716,996
    Expenses
    $493,656
    Assets (EOY)
    $743,798
  • 2014 · 990

    Revenue
    $112,993
    Expenses
    $447,075
    Assets (EOY)
    $418,296
  • 2013 · 990

    Revenue
    $368,730
    Expenses
    $316,127
    Assets (EOY)
    $786,547

Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. 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

No itemized grants to organizations. Schedule I is filed only by organizations that granted more than $5,000 to a recipient, so most filers have none.

Grants received

No itemized grant names this organization as a recipient. Only grants over $5,000 are itemized, and only by filers of the full Form 990.

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

  • GIOVANNI LORENZINI MEDICAL FOUNDATION

    501(C)(3) · SUPPORTING ORGANIZATION TO INTERNATIONAL ATHEROSCLEROSIS SOCIETY · NY

  • FONDAZIONE GIOVANNI LORENZINI

    501(C)(3) · PROMOTE THE ADVANCEMENT OF SCIENCE AND TEACHING · IT

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 13 October 2026, under deductibility PC.

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.

What this page reflects

The registration facts above come from the IRS Business Master File published 13 October 2026 and read 29 October 2026, for every organization at once. Returns through tax year 2024, the newest we have parsed for this organization.