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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 23-7105552

MID-PENINSULA DENTAL SOCIETY

Tax-exempt · MENLO PARK, CA 94025

Financials

$182K$180K2023$159K$180K2024$169K$177K2025
Revenue Expenses · by fiscal year end
Financials of MID-PENINSULA DENTAL SOCIETY by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
December 31, 2025990$168,509$176,705-$8,196$59,308$33,664$25,644
December 31, 2024990$159,027$180,327-$21,300$70,049$36,209$33,840
December 31, 2023990$182,384$180,141$2,243$82,389$27,249$55,140
Financial details: 990 for the year ended December 31, 2025

Revenue

Contributions, gifts and grants
$132,335
Membership dues
$130,335
Program service revenue
$31,457
Investment income
$2,100
Royalties
$13
Other revenue
$2,617

Expenses

Grants and similar amounts paid
$0
Compensation of officers, directors and key employees
$82,000
Other salaries and wages
$1,270
Salaries, compensation and benefits (total)
$95,972
Professional fundraising fees
$0
Accounting fees
$4,604
Occupancy
$8,336
Travel
$5,542
Program services (functional)
$8,099
Management and general (functional)
$168,606

Balance sheet and other

Total assets, start of year
$70,049
Total assets, end of year
$59,308
Total liabilities, end of year
$33,664
Net assets, end of year
$25,644
Net assets without donor restrictions
$25,644
Gross receipts
$168,509
Employees
3
Year formed
1949
State of legal domicile
CA

From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.

Officers, directors and key employees

As listed on the 990 for the year ended December 31, 2025, highest compensation first.

NameTitleHours / weekCompensation
Mary ConwayExecutive Dir.
Trustee or director
45$0
Christian Lee DDSPresident
Trustee or director
5$0
Curtis Contro DDSVice President
Trustee or director
5$0
Maryam Amidi DDSDirector
Trustee or director
2$0
Yarah Beddawi DDSDirector
Trustee or director
2$0
Ann Misra DDSDirector
Trustee or director
2$0
Nathan Kalinowski DMDDirector
Trustee or director
2$0
Adrienne Joy DMDSecretary
Trustee or director
5$0
Amelia Stoker DDSDirector
Trustee or director
5$0
990 for the year ended December 31, 2024: 9 people
NameTitleHours / weekCompensation
Mary ConwayExecutive Dir.
Trustee or director
45$82,000
Raees Mohammed DDSPresident
Trustee or director
10$0
Christian Lee DDSPresident
Trustee or director
5$0
Curtis Contro DDSTreasurer
Trustee or director
5$0
Maryam Amidi DDSVice President
Trustee or director
2$0
Yarah Beddawi DDSDirector
Trustee or director
2$0
Ann Misra DDSDirector
Trustee or director
2$0
Nathan Kalinowski DMDDirector
Trustee or director
2$0
Adrienne Joy DMDDirector
Trustee or director
2$0
990 for the year ended December 31, 2023: 9 people
NameTitleHours / weekCompensationOther / benefits
MARY CONWAYEXECUTIVE DIRECTOR
Key employee, Highest-paid employee
40$82,000$6,578
MARLANA SHILE DDSPRESIDENT
Trustee or director, Officer
1$0$0
RAEES MOHAMMED DDSPRESIDENT ELECT
Trustee or director, Officer
1$0$0
MARYAM AMIDI DDASECRETARY/TREASURER
Trustee or director, Officer
1$0$0
CHRISTIAN LEE DDSVICE PRESIDENT
Trustee or director, Officer
1$0$0
YARAH BEDDAAWI DDSMEMBER AT LARGE
Trustee or director
1$0$0
CURTIS CONTRO DDSMEMBER AT LARGE
Trustee or director
1$0$0
SHIV SHARMA DDSMEMBER AT LARGE
Trustee or director
1$0$0
SHEILA NGUYEN DDSMEMBER AT LARGE
Trustee or director
1$0$0

Address and contacts

Address (IRS master file)
3639 HAVEN AVE, MENLO PARK, CA 94025-1562
In care of
% MARY CONWAY
Principal officer (990 for 2025)
Christian Lee DDS, PO Box 1305, Menlo Park, CA 94026
Signed the 990
Christian Lee DDS, President
Phone
(650) 328-2242
Return prepared by
Campbell Tax

California records

California keeps its own records of charities and corporations. Search them by EIN 23-7105552 or by the name MID-PENINSULA DENTAL SOCIETY.

Attorney General, Registry of Charities and Fundraisers
Registration status and filed reports (CT-TR-1, RRF-1)

Mission

Acting as business and professional league for reputable practitioners of dentistry for the specific purpose of advancing the art of dentistry and educating the public in scientific dental care.

990 for the year ended December 31, 2025

Program accomplishments

  • ACTED AS BUSINESS AND PROFESSIONAL LEAGUE FOR REPUTABLE PRACTITIONERS OF DENTISTRY FOR THE SCIENTIFIC PURPOSE OF ADVANCING THE ART OF DENTISTRY AND EDUCATING THE PUBLIC IN SCIENTIFIC DENTAL CARE.
    Expenses $171,265 · grants $2,000 · revenue $160,048
  • CONDUCTED SPECIAL PROGRAMS FOR THE AWARENESS OF CPR, DENTAL LAW AND THE CORRECT HANDLING OF BIO HAZARDOUS WASTES AND MATERIALS
    Expenses $5,343 · revenue $6,461

What it must file and when

IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in December, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025December 31, 2025May 15, 2026990 on file
2024December 31, 2024May 15, 2025990 on file
2023December 31, 2023May 15, 2024990 on file

File the 2026 990-EZ for MID-PENINSULA DENTAL SOCIETY

Due May 17, 2027 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
23-7105552
Tax-exempt status
501(c)(6): Business league or chamber of commerce
Donations deductible
No
Exempt since
1971
Accounting year ends
December
Files
Form 990 or 990-EZ
Assets (IRS master file)
$59,308
Income (IRS master file)
$168,509

Filing history

FormYear endedRevenueExpensesAssetsReturn
990December 2025$168,509$176,705$59,308IRS
990December 2024$159,027$180,327$70,049IRS
990December 2023$182,384$180,141$82,389XML
990December 2022$157,727$172,375$81,031IRS
990December 2021–––IRS
990December 2020–––IRS
990December 2019–––IRS
990December 2018–––IRS

990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 23-7105552).

Questions about MID-PENINSULA DENTAL SOCIETY

What is the EIN of MID-PENINSULA DENTAL SOCIETY?
The employer identification number (EIN) of MID-PENINSULA DENTAL SOCIETY is 23-7105552.
Is MID-PENINSULA DENTAL SOCIETY tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(6) since 1971.
Are donations to MID-PENINSULA DENTAL SOCIETY tax-deductible?
No. The IRS master file says contributions to it are not deductible.
Which annual return does MID-PENINSULA DENTAL SOCIETY file?
Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
When is the next return of MID-PENINSULA DENTAL SOCIETY due?
The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did MID-PENINSULA DENTAL SOCIETY last file with the IRS?
The latest return in the IRS public files is the 990 for the year ended December 2025.
Who is the principal officer of MID-PENINSULA DENTAL SOCIETY?
The 990 for the year ended December 31, 2025 names Christian Lee DDS.
Who are the officers and directors of MID-PENINSULA DENTAL SOCIETY?
The 990 for the year ended December 31, 2025 lists 9 people; 0 received compensation from the organization.
How much revenue does MID-PENINSULA DENTAL SOCIETY have?
On its 990 for the year ended December 31, 2025 it reported revenue of $168,509, expenses of $176,705 and total assets of $59,308 at year end.

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