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US nonprofit · EIN 465749468 · East Boston, MAiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 465749468) - NTEE activity code, address.Board and officers IRS Form 990 annual filings, Part VII (directors, trustees, officers, key employees), read year by year to observe tenure.Latest return IRS Form 990 series e-file data - 990 for the year to 30 September 2025: assets, liabilities, staff, website, telephone, pay.Finances by year IRS Form 990 e-file data - total revenue and total expenses by tax year.Renewal outlook Computed by Governance Register from the observed filing history and filed revenue (us-approach-v4-clean). Not a statement that the organisation is recruiting.Principal officer IRS Form 990-N (e-Postcard) - principal officer named for tax year 2017.Exemption status IRS Automatic Revocation of Exemption List (posted to 13 October 2026).Deductibility IRS Publication 78 data (code PC), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

Parkinson Study Group Inc

Donations deductible
Revenue
$1.8m
year to 30 September 2025
Expenses
$1.6m
year to 30 September 2025
Total assets
$1.4m
$122k liabilities
Net assets
$1.3m
assets less liabilities
Directors and trustees
12
2.9y av
Staff
1
employees, year to 30 September 2025
Chair observed
≥3 yrs
Andrew Siderowf
Left since last filing
0
no seats appear to have opened
Exemption reinstated on 15 February 2017. The IRS had automatically revoked it on 15 February 2017 (after three years without a return). Source: IRS Automatic Revocation of Exemption List, posted to 13 October 2026.
How am I connected?

Parkinson Study Group Inc's network

12 peoplei12 people on this map.The large node is the subject of this page. Solid lines are what the register itself records (12). Form 990 filings give names without a person identifier; SEC insider filings carry a CIK.

The board

12 listediTime on the board is observed from the annual filings: the IRS files no appointment date, so the bar counts years from the first filing the person appears on - a lower bound, not a filed start date. Names are exactly as filed. The IRS publishes no person identifier, so this edition does not yet link a person across organisations.Tenure and departures are observed across annual filings. Observed tenure is a lower bound - a member may have joined before the first year on record. The organisation reported 12 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Andrew Siderowf ChairChair2022
4 yrs
Aleksandar VidenovicBoard Member2025
1 yr
Amy ChesireBoard Member2025
1 yr
Cindy CasaceliBoard Member2019
7 yrs
Donna MoszkowiczEx-officio2025
1 yr
Eric MacklinBoard Member2019
7 yrs
Irene MalatyBoard Member2025
1 yr
Joohi Jimenez-ShahedCo-Chair2022
4 yrs
Mary Maral MouradianBoard Member2025
1 yr
Ruth SchneiderBoard Member2025
1 yr
Sarah SperlingExecutive Director2025
1 yr
Vanessa HinsonBoard Member2025
1 yr
Under 5 years5 to 6 years6 years or moreShow all 12 →

Officers and senior leadership

1 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.
NameTitle as filedOn the filings
Sarah SperlingExecutive Directorsince 2022

Pay and hours

year to 30 September 2025iFrom Part VII of the Form 990: compensation reported for each officer, director, trustee, key employee and highest-paid staff member, and the average hours a week they report. Most board members are unpaid; a blank means nothing was reported. Pay from related organisations is shown separately.
NameTitle as filedHours a weekPay from the organisationRelated organisationsOther
Cindy CasaceliBoard Member6$0
Eric MacKlinBoard Member6$0
Joohi Jimenez-ShahedCo-Chair6$0
Andrew SiderowfChair6$0
Amy ChesireBoard Member6$0
Vanessa HinsonBoard Member0$0
Irene MalatyBoard Member0$0
Donna MoszkowiczEx-officio40$0
Ruth SchneiderBoard Member0$0
Mary Maral MouradianBoard Member0$0
Aleksandar VidenovicBoard Member0$0
Sarah SperlingExecutive Director40$0

No pay was reported for anyone in Part VII on this return.

About

Legal name
Parkinson Study Group Inc
EIN
465749468
Address
2 Neptune Rd PMB 420, East Boston, MA, 02128-1457
State
Massachusetts
Mission
(as filed on the Form 990)
Activity (NTEE)
G50 Voluntary health associations and medical disciplines
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Voluntary Health Associations & Medical Disciplines
Size band
6 (IRS master file code)
Formed
1986
IRS ruling date
1 December 2018
Status
Code 01 (unconditional exemption)
Form 990 filings on record
7, latest 2025
IRS Publication 78
PC (contributions deductible)
Principal officer
Micheal Schwazschild (Form 990-N, tax year 2017)

Most connected

Longest observed on the filings

≥7years on the filingsCindy Casaceli
≥7years on the filingsEric Macklin
≥4years on the filingsAndrew Siderowf
≥4years on the filingsJoohi Jimenez-Shahed

Latest return

year to 30 September 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 30 September 2025. US dollars, as filed.
Total assets
$1.4m
Total liabilities
$122k
Net assets or fund balances
$1.3m
Contributions and grants received
$970k
Program service revenue
$868k
Grants and similar paid out
$83k
Employees
1

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2023$966k$999kDeficit $32k

As filed on the IRS Form 990. US dollars.