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American Clinical Neurophysiology Society Inc

EIN 41-6035948 · Milwaukee, WI

Public records show a registered, tax-exempt organization in good standing.

LegitimacyPassesRegistration and standingFinancial healthStrong93 out of 100GovernanceStrong100 out of 100Impact evidenceDescribes programsHow well its results are evidenced

What it says it does

A PROFESSIONAL ASSOCIATION DEDICATED TO FOSTERING EXCELLENCE IN CLINICAL NEUROPHYSIOLOGY AND FURTHERING THE UNDERSTANDING OF CENTRAL AND PERIPHERAL NERVOUS SYSTEM FUNCTION IN HEALTH AND DISEASE THROUGH EDUCATION, RESEARCH, AND THE PROVISION OF A FORUM FOR DISCUSSION AND INTERACTION.

Income
$1.5 million
Spending
$1.5 million
Spent on programs
73%
Reserves
21.2 months of spending
Largest source of income
fees for its services, 67%
Employees
0
Volunteers
19

Source: Form 990 for the year ending May 31, 2025, filed with the Internal Revenue Service. Rating method 2026.2. How we rate

Financial health

Strong: 93 out of 100. Higher than 78% of charities in its peer group (health care, $1m to $10m).

  • Reserves

    35 of 35

    Spendable reserves would cover 21.2 months of spending.

  • Debt

    20 of 20

    It owes 9% of what it owns.

  • Living within its means

    8 of 15

    Spending exceeded income by 1% of income.

  • Income trend

    15 of 15

    Income rose 10% on the year before.

  • Spending floor

    15 of 15

    73% of spending went to programs and raising each dollar of donations cost 0 cents.

Source: Form 990 for the year ending May 31, 2025, filed with the Internal Revenue Service. Rating method 2026.2. How we rate

Governance

Strong: 100 out of 100. Higher than 67% of charities in its peer group (health care, $1m to $10m).

  • Independent board

    25 of 25

    17 of 17 voting board members are independent.

  • Conflict of interest policy

    15 of 15

    Has a written conflict of interest policy.

  • Whistleblower policy

    8 of 8

    Has a written whistleblower policy.

  • Record keeping policy

    7 of 7

    Has a written policy on keeping and destroying records.

  • Board minutes

    5 of 5

    Keeps minutes of board meetings.

  • Board sees the tax return

    10 of 10

    Gave the board a copy of this return before filing it.

  • Independent check of accounts

    15 of 15

    Its accounts were audited by an independent accountant.

  • No reported misuse

    10 of 10

    Reports no diversion of assets, excess benefits or loans to insiders.

Source: Form 990 for the year ending May 31, 2025, filed with the Internal Revenue Service. Rating method 2026.2. How we rate

Impact evidence

Describes programs. Its tax return describes what it does but we have found no measurable results in it.

Programs described in its return (3)
  1. $706,497 spent. ANNUAL MEETING: THE ANNUAL MEETING PROVIDES A SOLID REVIEW OF THE FUNDAMENTALS AND THE LATEST SCIENTIFIC ADVANCES IN BOTH "CENTRAL AND "PERIPHERAL" CLINICAL NEUROPHYSIOLOGY. PRESENTATIONS AT THE ANNUAL MEETING & COURSES ARE GIVEN BY LEADING EXPERTS IN THE FIELD AND HAVE VALUE FOR HEALTH CARE PROFESSIONALS WHO UTILIZE CLINICAL NEUROPHYSIOLOGY.
  2. $141,599 spent. JOURNAL: ACNS PUBLISHES AN OFFICIAL JOURNAL TO ADVANCE THE PRACTICE OF CLINICAL NEUROPHYSIOLOGY. THE JOURNAL OF CLINICAL NEUROPHYSIOLOGY FEATURES ORIGINAL RESEARCH ARTICLES THAT COVER KEY CONCERNS IN ELECTROENCEPHALOGRAPHY AND EVOKED POTENTIALS, CLINICAL NEUROLOGY, NEUROSURGERY, PSYCHIATRY, AND EXPERIMENTAL RESEARCH ON THE CENTRAL NERVOUS SYSTEM. HALF OF EACH ISSUE IS DEVOTED TO TOPICAL REVIEWS ON A SUBJECT OF INTEREST TO EEG SPECIALISTS
  3. $54,832 spent. COURSE: THESE COMPREHENSIVE COURSES PROVIDE PRACTICAL CLINICAL AND UP-TO-DATE RESEARCH INFORMATION ON THE RAPIDLY EVOLVING AREAS IN CLINICAL NEUROPHYSIOLOGY

Source: Form 990 for the year ending May 31, 2025, filed with the Internal Revenue Service. Rating method 2026.2. How we rate

Legitimacy checks

  1. Is it registered with the IRS? Passed.

    Listed in the IRS master file of tax-exempt organizations as a 501(c)(3) charitable organization.

    Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated September 7, 2026.

  2. Has the IRS revoked its tax-exempt status? Passed.

    Not on the IRS automatic revocation list.

    Source: Automatic revocation of exemption list, Internal Revenue Service, file dated September 30, 2026.

  3. Are donations tax-deductible? Passed.

    On the IRS list of organizations eligible to receive tax-deductible contributions.

    Source: Publication 78 data: organizations eligible for tax-deductible contributions, Internal Revenue Service, file dated September 10, 2026.

  4. Is it keeping up with its IRS filings? Passed.

    Most recent return on file covers the year ending May 2025.

    Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated September 7, 2026.

  5. How long has it been tax-exempt? Passed.

    Recognized by the IRS since February 1949.

    Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated September 7, 2026.

  6. Is it in good standing with state regulators? Passed.

    Not on California's list of charities barred from soliciting. Other states are not yet checked.

    Source: May Not Operate or Solicit for Charitable Purposes list, California Attorney General, Registry of Charities and Fundraisers, file dated October 7, 2026.

  7. Could it be confused with another charity? Worth knowing.

    A much larger organization has a similar name: American Society of Clinical Oncology (Alexandria, VA), EIN 13-6180380. If that is the one you meant, check the EIN before giving.

    Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated September 7, 2026.

Ratings and checks are our reading of public records, using the published method. They are not a statement about anyone's honesty. If you work for this organization, you can send corrections or results, confirm you want gifts through Veridonate, or ask to be removed from giving.