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Medical Society Of Sonoma County

  • Petaluma, CA
  • Tax-exempt since Nov. 2017
  • EIN: 82-1456994

Organization summary

Type of Nonprofit

Designated as a Organizations for any of the following purposes: religious, educational, charitable, scientific, literary, testing for public safety, fostering national or international amateur sports competition (as long as it doesn't provide athletic facilities or equipment), or the prevention of cruelty to children or animals.

Category: Health — General and Rehabilitative / Health Support Services (NTEE)

Donations to this organization are tax deductible.

Summary charts: organization finances over time

Revenue
$0 (2024)

Expenses
$25.1k (2024)

Total Assets
$37.1k (2024)

Total Liabilities
$0 (2024)

Source: Form 990 tax filings from 2019 to 2024

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. If this organization filed an amended return, it may not be reflected below. Duplicate download links may indicate a resubmission or amendment to this organization's original return. Form 990 data is from the IRS.

Fiscal Year Ending Dec.
2024

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$0
Expenses
$25,117
Net Income
-$25,117
Net Assets
$37,113
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $0
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $37,113
Total Liabilities $0
Net Assets $37,113
Compensation
Key Employees and Officers Compensation Other
Warren Chin Md (President) $0 $0
Ramzi Deeik Md (President Elect) $0 $0
Yimdriuska Magan Mendoza Md (Secretary/Treasurer) $0 $0
James O'dorisio Md (Immediate Past President) $0 $0
Harjot Bhandal Md (Director) $0 $0
Allen Cortez Md (Director) $0 $0
Marshall Kubota Md (Director) $0 $0
Paula Dhanda Md (Director) $0 $0
Briga Mullin Md (Director) $0 $0
Roger Pitzen Md (Director) $0 $0
Tanya Phares Md (Director) $0 $0
Indranushi Chaliha Md (Director) $0 $0
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Document Links

990-EZ
Filed on Nov. 13, 2025

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

View Filing
XML

Fiscal Year Ending Dec.
2023

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$600
Expenses
$33,706
Net Income
-$33,106
Net Assets
$49,917
Notable Sources of Revenue Percent of Total Revenue
Contributions $600
100%
Program Services $0
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $51,417
Total Liabilities $1,500
Net Assets $49,917
Compensation
Key Employees and Officers Compensation Other
James O'dorisio Md (President) $0 $0
Warren Chin Md (President Elect) $0 $0
Ramzi Deeik Md (Secretary/Treasurer) $0 $0
Patricia Hiserote Do (Immediate Past President) $0 $0
Harjot Bhandal Md (Director) $0 $0
Allen Cortez Md (Director) $0 $0
Marshall Kubota Md (Director) $0 $0
Paula Dhanda Md (Director) $0 $0
Briga Mullin Md (Director) $0 $0
Roger Pitzen Md (Director) $0 $0
Yimdriuska Magan Mendoza Md (Director) $0 $0
Andy Coren Md (Director) $0 $0
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Document Links

990-EZ
Filed on Nov. 15, 2024

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

View Filing
XML

Fiscal Year Ending Dec.
2022

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$1,200
Expenses
$33,949
Net Income
-$32,749
Net Assets
$83,023
Notable Sources of Revenue Percent of Total Revenue
Contributions $1,100
91.7%
Program Services $0
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $100
8.3%
Assets/Debt
Total Assets $92,572
Total Liabilities $9,549
Net Assets $83,023
Compensation
Key Employees and Officers Compensation Other
Patricia Hiserote Do (President) $0 $0
James O'dorisio Md (President Elect) $0 $0
Shawn Daly Md (Secretary/Treasurer) $0 $0
Nikola Lozanov Md (Director) $0 $0
Warren Chin Md (Director) $0 $0
Allen Cortez Md (Director) $0 $0
Marshall Kubota Md (Director) $0 $0
Brian Gambardella Md (Director) $0 $0
Patricia May Md (Director) $0 $0
Roger Pitzen Md (Director) $0 $0
Allison Lukacic Do (Director) $0 $0
Andy Coren Md (Director) $0 $0
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Document Links

990-EZ
Filed on Oct. 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
$170,628
Expenses
$82,423
Net Income
$88,205
Net Assets
$115,772
Notable Sources of Revenue Percent of Total Revenue
Contributions $170,628
100%
Program Services $0
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $117,272
Total Liabilities $1,500
Net Assets $115,772
Compensation
Key Employees and Officers Compensation Other
Rajesh Ranadive Md (Immediate Past President) $0 $0
Robert Schulman Md (President) $0 $0
Tara Bartlett Do (Director) $0 $0
Shawn Daly Md (Secretary/Treasurer) $0 $0
Patricia Hiserote Do (President Elect) $0 $0
Chad Krilich Md (Director) $0 $0
Marshall Kubota Md (Director) $0 $0
Yong Liu Md (Director) $0 $0
Patricia May Md (Director) $0 $0
Roger Pitzen Md (Director) $0 $0
Tara Bartlett Md (Director) $0 $0
Regina Sullivan Md (Director) $0 $0
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Document Links

990-EZ
Filed on Nov. 15, 2022

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

View Filing
XML

Fiscal Year Ending Dec.
2020

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$3,465
Expenses
$5,120
Net Income
-$1,655
Net Assets
$27,567
Notable Sources of Revenue Percent of Total Revenue
Contributions $3,465
100%
Program Services $0
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $29,067
Total Liabilities $1,500
Net Assets $27,567
Compensation
Key Employees and Officers Compensation Other
Rajesh Ranadive Md (President) $0 $0
Robert Schulman Md (President Elect) $0 $0
Tara Bartlett Do (Director) $0 $0
Eric Culbertson Md (Director) $0 $0
Shawn Daly Md (Director) $0 $0
Patricia Hiserote Do (Director) $0 $0
Chad Krilich Md (Director) $0 $0
Marshall Kubota Md (Director) $0 $0
Yong Liu Md (Director) $0 $0
Patricia May Md (Director) $0 $0
Roger Pitzen Md (Director) $0 $0
Tara Scott Md (Director) $0 $0
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Document Links

990-EZ
Filed on Nov. 15, 2021

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

View Filing
PDF XML

Fiscal Year Ending Dec.
2019

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$14,228
Expenses
$25,616
Net Income
-$11,388
Net Assets
$29,222
Notable Sources of Revenue Percent of Total Revenue
Contributions $14,228
100%
Program Services $0
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $29,222
Total Liabilities $0
Net Assets $29,222

Document Links

990-EZ

Short form 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 information processed by the IRS during the 2012-2019 calendar years; this generally consists of filings for the 2011-2018 fiscal years, but may include 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 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?

Every organization that has been recognized as tax exempt by the IRS has to file 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 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."

Nonprofit Explorer has organizations claiming tax exemption in each of the 27 subsections of the 501(c) section of the tax code, and which have filed a Form 990, Form 990EZ or Form 990PF. Taxable trusts and private foundations that are required to file a form 990PF are also included. Small organizations filing a Form 990N "e-Postcard" are not included in this data.

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 EINs 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. Bulk PDF downloads since 2017 are available from the IRS.
  • 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.

API

The data powering this website is available programmatically, via an API. Read the API documentation »

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About Nonprofit Explorer

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.

By Andrea Suozzo, Alec Glassford, Ash Ngu and Brandon Roberts.

Design by Jeff Frankl. Additional development by Ken Schwencke, Mike Tigas, and Sisi Wei.

E-file viewer adapted from IRS e-File Viewer by Ben Getson. Code for scraping audit documents adapated from Govwiki.

Updated