Washington State Neurological Society

  • Seattle, WA
  • Tax exemption issued: Jan. 2006
  • EIN: 20-1432287

Organization summary

Type of Nonprofit

Designated as a Business leagues, chambers of commerce, real estate boards, etc, created for the improvement of business conditions.

Category: Community Improvement, Capacity Building / Promotion of Business (NTEE)

Donations to this organization are not tax deductible.

Tax Filings by Year

Form 990 is an information return that most organizations claiming federal tax-exempt status must file yearly with the IRS. Nonprofit Explorer has IRS digitized Form 990 data for filings processed in 2012 and later. Duplicate download links may indicate a resubmission or amendment to this organization's original return. Organizations with gross receipts of less than $50,000 can file the form 990-N postcard filing, which doesn’t include financial details. All Form 990 data is from the IRS.

Fiscal Year Ending Dec.
2025

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$94,325
Expenses
$63,818
Net Income
$30,507
Net Assets
$102,603
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $88,675
94.0%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $103,353
Total Liabilities $750
Net Assets $102,603
Compensation
Key Employees and Officers Compensation Other
Jason Aldred Md (President) $0 $0
Pravin Khemani Md (Immediate Past President) $0 $0
Ye Hu Md (Secretary-treasurer) $0 $0
Erin Eddington Alden Arnp (Member At Large) $0 $0
Nina Bozinov Md (Member At Large) $0 $0
Dhaval Desai Md (Member At Large) $0 $0
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990-EZ
Filed on July 27, 2026

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2024

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$91,373
Expenses
$60,224
Net Income
$31,149
Net Assets
$72,096
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $82,600
90.4%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $1,800
2.0%
Assets/Debt
Total Assets $72,096
Total Liabilities $0
Net Assets $72,096
Compensation
Key Employees and Officers Compensation Other
Pravin Khemani Md (President) $0 $0
Ye Hu Md (Secretary-treasurer) $0 $0
Erin Eddington Alden Arnp (Member At Large) $0 $0
Jason Aldred Md (Member At Large) $0 $0
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990-EZ
Filed on July 28, 2025

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2023

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$58,470
Expenses
$48,433
Net Income
$10,037
Net Assets
$40,947
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $50,950
87.1%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $40,947
Total Liabilities $0
Net Assets $40,947
Compensation
Key Employees and Officers Compensation Other
Lynne Taylor Md (President) $0 $0
Pravin Khemani Md (Vice President) $0 $0
Laura Koehn Md (Secretary-treasurer) $0 $0
Michael Elliott Md (Trustees) $0 $0
Judy Ozuna Arnp (Trustees) $0 $0
Michael Previti Md (Member At Large) $0 $0
Kester Philips Md (Member At Large) $0 $0
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990-EZ
Filed on Sept. 10, 2024

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2022

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$37,345
Expenses
$37,443
Net Income
-$98
Net Assets
$30,910
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $29,300
78.5%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $30,910
Total Liabilities $0
Net Assets $30,910
Compensation
Key Employees and Officers Compensation Other
Lynne Taylor Md (President) $0 $0
Pravin Khemani Md (Vice President) $0 $0
Laura Koehn Md (Secretary-treasurer) $0 $0
Michael Elliott Md (Member At Large) $0 $0
Michael Previti Md (Member At Large) $0 $0
Kester Philips Md (Member At Large) $0 $0
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990-EZ
Filed on Aug. 30, 2023

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2021

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$21,160
Expenses
$25,176
Net Income
-$4,016
Net Assets
$31,008
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $15,250
72.1%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $31,008
Total Liabilities $0
Net Assets $31,008
Compensation
Key Employees and Officers Compensation Other
Michael Elliott Md (President) $0 $0
Lynne Taylor Md (Vice President) $0 $0
David Likosky Md (Secretary-treasurer) $0 $0
Don Thai Md (Member At Large) $0 $0
Pravin Khemani Md (Member At Large) $0 $0
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990-EZ
Filed on July 11, 2022

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2020

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$4,995
Expenses
$26,942
Net Income
-$21,947
Net Assets
$35,024
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $1,650
33.0%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $35,024
Total Liabilities $0
Net Assets $35,024
Compensation
Key Employees and Officers Compensation Other
Michael Elliott Md (President) $0 $0
David Vossler Md (Immediate Past President) $0 $0
Lynne Taylor Md (Vice President) $0 $0
David Likosky Md (Secretary-treasurer) $0 $0
Don Thai Md (Member At Large) $0 $0
Pravin Khemani Md (Member At Large) $0 $0
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990-EZ
Filed on Aug. 9, 2021

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2019

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$41,320
Expenses
$58,694
Net Income
-$17,374
Net Assets
$56,971
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $33,900
82.0%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $56,971
Total Liabilities $0
Net Assets $56,971
Compensation
Key Employees and Officers Compensation Other
Michael Elliott Md (President) $0 $0
David Vossler Md (Immediate Past President) $0 $0
Lynne Taylor Md (Vice President) $0 $0
David Likosky Md (Secretary-treasurer) $0 $0
Don Thai Md (Member At Large) $0 $0
Pravin Khemani Md (Member At Large) $0 $0
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990-EZ
Filed on Sept. 29, 2020

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2018

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$68,630
Expenses
$44,120
Net Income
$24,510
Net Assets
$74,345
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $60,900
88.7%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $74,345
Total Liabilities $0
Net Assets $74,345
Compensation
Key Employees and Officers Compensation Other
David Vossler Md (President) $0 $0
Maciej Mrugala Md (Immediate Past President) $0 $0
Michael Elliott Md (Vice President) $0 $0
Lynne Taylor Md (Secretary-treasurer) $0 $0
David Likosky Md (Member At Large) $0 $0
Ellen Model Md (Member At Large) $0 $0
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Document Links

990-EZ
Filed on Sept. 11, 2019

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2017

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$51,345
Expenses
$57,473
Net Income
-$6,128
Net Assets
$49,835
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $39,150
76.2%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $49,835
Total Liabilities $0
Net Assets $49,835
Compensation
Key Employees and Officers Compensation Other
David Vossler Md (President) $0 $0
Maciej Mrugala Md (Past President) $0 $0
Michael Elliott Md (Vice President) $0 $0
Lynne Taylor Md (Secretary-treasurer) $0 $0
David Likosky Md (Member At Large) $0 $0
Ellen Model Md (Member At Large) $0 $0
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990-EZ
Filed on Aug. 15, 2018

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2016

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$41,180
Expenses
$40,340
Net Income
$840
Net Assets
$55,963
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $32,650
79.3%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $55,963
Total Liabilities $0
Net Assets $55,963
Compensation
Key Employees and Officers Compensation Other
Maciej Mrugala Md (President) $0 $0
Wdale Overfield Md (Past President) $0 $0
David Vossler Md (Vice President) $0 $0
Michael Elliott Md (Secretary-treasurer) $0 $0
Lynne Taylor Md (Member At Large) $0 $0
Joseph Tornabene Md (Member At Large) $0 $0
Eric Gierke Md (Immediate Past President) $0 $0
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990-EZ
Filed on July 24, 2017

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2015

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$37,685
Expenses
$42,255
Net Income
-$4,570
Net Assets
$55,123
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $31,075
82.5%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $55,123
Total Liabilities $0
Net Assets $55,123
Compensation
Key Employees and Officers Compensation Other
Maciej Mrugala Md (President) $0 $0
Wdale Overfield Md (Past President) $0 $0
David Vossler Md (Vice President) $0 $0
Michael Elliott Md (Secretary-treasurer) $0 $0
Lynne Taylor Md (Member At Large) $0 $0
Joseph Tornabene Md (Member At Large) $0 $0
Eric Gierke Md (Immediate Past President) $0 $0
+ View more people

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990-EZ
Filed on June 30, 2016

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2014

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$55,745
Expenses
$40,576
Net Income
$15,169
Net Assets
$59,693
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $40,450
72.6%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $600
1.1%
Assets/Debt
Total Assets $59,693
Total Liabilities $0
Net Assets $59,693
Compensation
Key Employees and Officers Compensation Other
Eric Gierke Md (President) $0 $0
Wdale Overfield Md (Past President) $0 $0
Maciej Mrugala Md (Vice President) $0 $0
David Vossler Md (Secretary-treasurer) $0 $0
Michael Elliott (Member At Large) $0 $0
Joseph Tornabene Md (Member At Large) $0 $0
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990-EZ
Filed on July 13, 2015

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2013

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$42,180
Expenses
$36,873
Net Income
$5,307
Net Assets
$44,524
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $33,840
80.2%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $44,524
Total Liabilities $0
Net Assets $44,524

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2012

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$43,745
Expenses
$42,635
Net Income
$1,110
Net Assets
$39,217
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $33,020
75.5%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $39,217
Total Liabilities $0
Net Assets $39,217

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2011

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$43,305
Expenses
$35,759
Net Income
$7,546
Net Assets
$38,107
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $33,030
76.3%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $38,107
Total Liabilities $0
Net Assets $38,107

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2010

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2009

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2008

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2007

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2006

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2005

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2004

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

About This Data

What Is This Data?

Nonprofit Explorer includes summary data for nonprofit tax returns and full Form 990 documents, in both PDF and digital formats.

The summary data contains financial information from tax returns processed by the IRS since the 2012 calendar years, as well as data extracted from digital filings. IRS summary data also includes limited older records. This data release includes only a subset of what can be found in the full Form 990s.

In addition to the raw summary data, we link to PDFs and digital copies of full Form 990 documents wherever possible. This consists of separate releases by the IRS of Form 990 documents processed by the agency, which we update regularly.

We also link to copies of audits for nonprofit organizations that spent $750,000 or more in federal grant money in a single fiscal year since 2016. These audits are copied from the Federal Audit Clearinghouse.

Which Organizations Are Here?

Most organizations that have been recognized as tax exempt by the IRS have to file the Form 990 every year, unless they make less than $200,000 in revenue and have less than $500,000 in assets, in which case they have to file the Form 990-EZ. Organizations making less than $50,000 don’t have to file either form but do have to let the IRS they’re still in business via a Form 990N "e-Postcard," which does not contain financial details. Churches are not required to file Form 990.

Nonprofit Explorer has organizations that are claiming tax exemption in any of the 27 subsections of the 501(c) section of the tax code. Taxable trusts and private foundations that are required to file a form 990PF are also included.

Types of Nonprofits

There are 27 nonprofit designations based on the numbered subsections of section 501(c) of the tax code. See the list »

Get the Data

For those interested in acquiring the original data from the source, here’s where our data comes from:

  • Raw filing data. Includes Employer Identification Numbers and summary financials as structured data.
  • Exempt Organization profiles. Includes organization names, addresses, etc. You can merge this with the raw filing data using EIN numbers.
  • Form 990 documents. Prior to 2017, these documents were obtained and processed by Public.Resource.org and ProPublica.
  • Form 990 documents as XML files. Includes complete filing data (financial details, names of officers, tax schedules, etc.) in machine-readable format. Only available for electronically filed documents. Electronic data released prior to October 2021 is also available through Amazon Web Services.
  • Audits. PDFs of single or program-specific audits for nonprofit organizations that spent $750,000 or more in federal grant money in a single fiscal year. Available for fiscal year 2015 and later.

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Nonprofit Explorer

Browse millions of annual returns filed by tax-exempt organizations with ProPublica’s Nonprofit Explorer. See details like executive compensation, revenue, expenses and more. Search for an organization or a person, or search the full text of filings.

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