World Society for Stereotactic and Functional Neurosurgery

Nonprofit profile at a glance

EIN
850653006
IRS 990-EZ coverage
2022–2025
Forms available
Form 990-EZ 2025, Form 990-N 2021
Location
Frederic, WI, USA
Phone
7153278818
Rating confidence
Limited
Sector
Professional Societies, Associations

Reported finances

Revenue
$19,351
Expenses
$27,557
Assets
$91,457
Liabilities
$0

Source: IRS Form 990-EZ. Selected filing: tax year 2025. Amounts in USD.

Leadership & pay

3 people listed

Executive titles in this filing

  • KONSTANTIN SLAVIN (PRESIDENT)

People named in this filing

  • KONSTANTIN SLAVIN (PRESIDENT)
  • MOJGAN HODAIE (SECRETARY)
  • MELODY M DIAN (ADMINISTRATOR)

Selected names, not a complete roster or a statement of current roles. Open leadership details for the complete filed list.

Source: IRS Form 990-EZ. Selected filing: tax year 2025. Names and roles reflect this filing, not necessarily current officeholders.

Overview

Mission

To further and promote charitable, scientific and educational purposes of various neurological disorders and procedures. Encourage and organize collaboration to improve the interdisciplinary approach on stereotactic and functional neurosurgery.

What it reported doing in 2025

Same as exempt purpose

Operating model

Revenue model
Investment-supported. 78% of the money available for current operations came from recurring investment income.
Distribution model
Cannot be determined from the filing. The filing does not provide enough consistent spending detail to tell whether the nonprofit works directly or through others.

The verdict

- The available evidence is not sufficient to produce an overall rating for this filing. This is not a warning sign.

Rating breakdown

  • Financial Efficiency: NotEnoughData
  • Transparency & Controls: 82
  • Sustainability: 43
  • Growth: 20

Detailed rating inputs

Financial Efficiency

  • Mission deployment rate: Limited
  • Program expense ratio: Limited

Transparency & Controls

  • Consistency checks: 100%; rating input score 100; 51st percentile among comparable filings
  • Major donor itemization: Limited

Sustainability

  • Operating margin: -42.4%; rating input score 14; 14th percentile among comparable filings
  • Total-asset coverage ratio: 3.32; rating input score 76; 76th percentile among comparable filings
  • Liabilities to assets ratio: 0; rating input score 66; 66th percentile among comparable filings
  • Officer compensation ratio: 0%; rating input score 56; 56th percentile among comparable filings

Growth

  • Program expense growth: Limited
  • Revenue growth: -58% per year; rating input score 0; 5th percentile among comparable filings
  • Asset growth: 2.4% per year; rating input score 100; 47th percentile among comparable filings

Details

  • Where the money goes: Financial trends and filed revenue, expense, asset, and liability detail
  • Governance: Filed governance answers
  • Accomplishments: 1 filed program accomplishment
  • Leadership: top reported pay $0 · 3 people listed
  • Consistency: 6 of 6 current checks pass
  • Schedules: 2 filed schedules
  • Filing history: 4 filing years from 2022 to 2025
  • Contacts: How to reach this organization
  • Grant readiness: Federal tax and exclusion status, award history, and grant-maker relationships.
  • People: Everyone the filings name, and which of them the filings identify by more than a name.

Key Signals

Signals prioritize questions for review. They are not findings of misconduct.

  • High — Growth: Revenue growth scored 0/100.
  • High — Sustainability: Operating margin scored 14/100.
  • Review — Sustainability: Officer compensation ratio scored 56/100.