Massachusetts Association Of Ambulatory Surgery Centers Inc

  • Waltham, MA
  • Tax exemption issued: June 1993
  • EIN: 04-3173779

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.

Donations to this organization are 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
$113,814
Expenses
$167,258
Net Income
-$53,444
Net Assets
$71,203
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 $52,614
46.2%
Assets/Debt
Total Assets $71,203
Total Liabilities $0
Net Assets $71,203
Compensation
Key Employees and Officers Compensation Other
Greg Deconciliis (President) $2,500 $2,500
Ellen Rostron (Treasurer) $1,500 $1,500
Patty Mckenna (Secretary) $1,500 $1,500
Katie Murphy (Vice President) $1,500 $1,500
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Document Links

990-EZ
Filed on Jan. 24, 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
$90,456
Expenses
$68,223
Net Income
$22,233
Net Assets
$124,647
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 $45,956
50.8%
Assets/Debt
Total Assets $124,647
Total Liabilities $0
Net Assets $124,647
Compensation
Key Employees and Officers Compensation Other
Greg Deconciliis (President) $2,500 $0
Jessica Mcdermott (Vp) $1,500 $0
Ellen Rostron (Treasurer) $1,500 $0
Patty Mckenna (Secretary) $1,500 $0
Katie Murphy (Office) $1,000 $0
+ View more people

Document Links

990-EZ
Filed on Jan. 22, 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
$44,283
Expenses
$40,414
Net Income
$3,869
Net Assets
$102,414
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 $33
0.1%
Assets/Debt
Total Assets $102,414
Total Liabilities $0
Net Assets $102,414
Compensation
Key Employees and Officers Compensation Other
Greg Deconciliis (President) $2,500 $0
Jessica Mcdermott (Vp) $1,500 $0
Ellen Rostron (Treasurer) $1,500 $0
Norma Bacon (Secretary) $1,500 $0
+ View more people

Document Links

990-EZ
Filed on Jan. 19, 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
$95,691
Expenses
$75,129
Net Income
$20,562
Net Assets
$98,545
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 $51,441
53.8%
Assets/Debt
Total Assets $98,545
Total Liabilities $0
Net Assets $98,545
Compensation
Key Employees and Officers Compensation Other
Gregory Deconciliis (President) $2,500 $0
Jessica Mcdermott (Vice President) $1,500 $0
Ellen Rostron (Treasurer) $1,500 $0
Norma Bacon (Secretary) $1,500 $0
Katie Murphy (Office Assist) $1,000 $0
+ View more people

Document Links

990-EZ
Filed on Jan. 17, 2023

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

View Filing
PDF XML

Fiscal Year Ending Dec.
2021

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$45,262
Expenses
$40,504
Net Income
$4,758
Net Assets
$77,983
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 $60
0.1%
Assets/Debt
Total Assets $77,983
Total Liabilities $0
Net Assets $77,983
Compensation
Key Employees and Officers Compensation Other
Gregory Deconciliis (President) $2,500 $0
Jessica Mcdermott (Vice President) $1,500 $0
Ellen Rostron (Treasurer) $1,500 $0
Norma Bacon (Secretary) $1,500 $0
+ View more people

Document Links

990-EZ
Filed on Jan. 25, 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
$41,371
Expenses
$41,016
Net Income
$355
Net Assets
$73,225
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 $142
0.3%
Assets/Debt
Total Assets $73,225
Total Liabilities $0
Net Assets $73,225

Document Links

990-EZ

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

PDF

Fiscal Year Ending Dec.
2019

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$88,515
Expenses
$69,432
Net Income
$19,083
Net Assets
$72,870
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 $45,265
51.1%
Assets/Debt
Total Assets $72,870
Total Liabilities $0
Net Assets $72,870

Document Links

990-EZ

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

PDF

Fiscal Year Ending Dec.
2018

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$85,351
Expenses
$58,803
Net Income
$26,548
Net Assets
$56,129
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 $51,401
60.2%
Assets/Debt
Total Assets $56,129
Total Liabilities $0
Net Assets $56,129

Document Links

990-EZ

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

PDF

Fiscal Year Ending Dec.
2017

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$64,959
Expenses
$64,437
Net Income
$522
Net Assets
$29,581
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 $42,609
65.6%
Assets/Debt
Total Assets $29,581
Total Liabilities $0
Net Assets $29,581

Document Links

990-EZ

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

PDF

Fiscal Year Ending Dec.
2016

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$70,071
Expenses
$65,714
Net Income
$4,357
Net Assets
$29,059
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 $44,447
63.4%
Assets/Debt
Total Assets $29,059
Total Liabilities $0
Net Assets $29,059

Document Links

990-EZ

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

PDF

Fiscal Year Ending Dec.
2015

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$62,672
Expenses
$57,525
Net Income
$5,147
Net Assets
$24,702
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 $38,422
61.3%
Assets/Debt
Total Assets $24,702
Total Liabilities $0
Net Assets $24,702

No Document Links

The IRS has provided extracted financial data for this filing, but has not yet released the source documents.

Fiscal Year Ending Dec.
2014

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$66,288
Expenses
$50,411
Net Income
$15,877
Net Assets
$19,555
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 $35,838
54.1%
Assets/Debt
Total Assets $19,555
Total Liabilities $0
Net Assets $19,555

Document Links

990-EZ

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

PDF
PDF (2 of 2)

Fiscal Year Ending Dec.
2013

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$56,546
Expenses
$62,787
Net Income
-$6,241
Net Assets
$3,678
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 $33,496
59.2%
Assets/Debt
Total Assets $3,678
Total Liabilities $0
Net Assets $3,678

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
$34,200
Expenses
$51,827
Net Income
-$17,627
Net Assets
$9,919
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 $9,919
Total Liabilities $0
Net Assets $9,919

Document Links

990-EZ

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

PDF
PDF (2 of 3) PDF (3 of 3)

Fiscal Year Ending Dec.
2011

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$31,119
Expenses
$31,567
Net Income
-$448
Net Assets
$27,546
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 $27,546
Total Liabilities $0
Net Assets $27,546

Document Links

990-EZ

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

PDF
PDF (2 of 2)

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-EZ

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

PDF
PDF (2 of 2)

Fiscal Year Ending Dec.
2003

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.
2001

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

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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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.

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