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Governance Register
US nonprofit · EIN 461581524 · Washington, DCiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 461581524) - 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 time served.Latest return IRS Form 990 series e-file data - 990 for the year to 31 December 2024: 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. Not a statement that the organisation is recruiting.Licence US Federal Government public domain.How we handle data

National Association of Acos' network

16 people3 organisationsi16 people and 3 organisations on this map.The large node is the subject of this page. Solid lines are what the register itself records (16). Violet dotted lines (5) are likely: the same full name sits on the current board of another organisation in the same register and region. Form 990 filings give names without a person identifier; SEC insider filings carry a CIK. It may be a different person.

The board

16 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 in the tables. The network map shows same-name matches as likely links only, never as confirmed.Time served and departures are observed across annual filings. Observed time served is a lower bound - a member may have joined before the first year on record. The organisation reported 16 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Emily Brower ChairChair2018
8 yrs
Melanie Matthews ChairChair-Elect2021
5 yrs
Anthony ValdesMember2022
4 yrs
Arshad RahimMember2023
3 yrs
Bob Rauner (also filed as Bob Rauner)Member2023
3 yrs
Clif GausMember2018
8 yrs
Geoffrey Nichlson JrMember2024
2 yrs
Jennifer Moore (also filed as Jen Moore, Jen Moore)Member-at-large2018
8 yrs
Jenny ReedMember2024
2 yrs
Margarita OlletMember2023
3 yrs
Nina TaggartMember2021
5 yrs
Rebecca AdkinsMember2023
3 yrs
Rebecca RohrbachMember2021
5 yrs
Stephen NuckollsCompany secretary2018
8 yrs
TIM Gronniger (also filed as Tim Gronniger)Member2021
5 yrs
Travis BroomeTreasurer2019
7 yrs
Under 5 years5 to 6 years6 years or moreShow all 16 →

Officers and senior leadership

17 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.
NameTitle as filedOn the filings
Aisha PittmanSVP Government Affairssince 2023
Allison BrennanSVP Government Affairssince 2018
Alyssa NeumannSr Analyst, Regulatory Affairs2023
Anna LafayetteDirector of Operations2023
Brian HammerVP Member & Business Servicessince 2018
Clif GausPresident/CEO2024
David PittmanCommunications Advisorsince 2020
Diwen ChenSr Dir of Payer Policy2024
Elizabeth HolderDirector of It2023
Jen RiveraMembership Director2023
Jennifer GasperiniPolicy Affairssince 2020
Jennifer MuldoonSVP of Operations Health Polisince 2018
Jennifer RotchfordSR VP of Operations2024
Melody Danko-HolsombackVP of Educationsince 2022
Robert MechanicResearch Strategysince 2018
Robert DaleyLegislative Affairs Directorsince 2023
Teresa LittonSenior Policy Advisor2018

Pay and hours

year to 31 December 2024iFrom 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
Clif GausPresident/CEO40$565k$17k
Aisha PittmanSR VP of Gov't Affairs40$333k$13k
Jennifer RotchfordSR VP of Operations40$260k$18k
Diwen ChenSr Dir of Payer Policy40$167k$5k
Melody Danko-HolsombackVP of Education40$162k$10k
Robert DaleyDir Legislative Affairs40$153k$9k
Emily BrowerChair1$0
Melanie MatthewsChair-Elect1$0
Travis BroomeTreasurer1$0
Stephen NuckollsSecretary1$0
Anthony ValdesMember1$0
Arshad RahimMember1$0
Bob RaunerMember1$0
Clif GausMember1$0
Geoffrey Nichlson JrMember1$0
Jen MooreMember-at-large1$0
Jenny ReedMember1$0
Margarita OlletMember1$0
Nina TaggartMember1$0
Rebecca AdkinsMember1$0
Rebecca RohrbachMember1$0
Tim GronnigerMember1$0

About

Legal name
National Association of Acos
EIN
461581524
Address
2001 L Street Nw, Washington, DC, 20036-4910
State
District of Columbia
Mission
NAACOS is a member-led and member-governed non-profit association that seeks to advance provider-led transformation toward better care, improved health, and smarter spending by fostering collaboration and accountability in health care. (as filed on the Form 990)
Activity (NTEE)
S41 Community improvement and capacity building
IRS classification
501(c)06 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Community Improvement & Capacity Building
Size band
6 (IRS master file code)
Formed
2012
Principal officer
Emily Brower (as named on the Form 990)
IRS ruling date
1 November 2014
Status
Code 01 (unconditional exemption)
Form 990 filings on record
7, latest 2024

Most connected

Longest observed on the filings

≥8years on the filingsEmily Brower
≥8years on the filingsClif Gaus
≥8years on the filingsJennifer Moore
≥8years on the filingsStephen Nuckolls

Latest return

year to 31 December 2024iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 December 2024. US dollars, as filed.
Total assets
$3.4m
Total liabilities
$4k
Net assets or fund balances
$3.4m
Contributions and grants received
$0
Program service revenue
$5.9m
Employees
19
Volunteers
832

Filed finances

2 yearsiTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$6.1m$5.8m$325k
2023$6m$5.4m$657k

As filed on the IRS Form 990. US dollars.

State registration

1 entityiBusiness-entity registers published by US states. These records are matched to this organisation by name and state, not by EIN, and are labelled as likely matches. Street addresses are not shown.
National Association of ACOS, Inc. likely matchiMatched by exact name and state (and ZIP where shown). State registers do not publish EINs, so this is not a confirmed match. Source: DC Department of Licensing and Consumer Protection (DLCP), corporate registrations (opendata.dc.gov). Licence: CC BY 4.0. Attribution: DC DLCP. Data last fetched 18 October 2026.
State
District of Columbia
Entity type
Foreign Nonprofit Corporation
Status
Active - In Good Standing
Formed
8 March 2017
Registered agent
C T Corporation System (city and state not held)