Massachusetts · Nonprofit
NORTH AMERICAN THROMBOSIS FORUM INC D/B/A VASCULEARN NETWORK
NORTH AMERICAN THROMBOSIS FORUM INC D/B/A VASCULEARN NETWORK (Massachusetts) receives grants from 6 organizations whose IRS filings report $171,320 to it, the largest being FIDELITY INVESTMENTS CHARITABLE GIFT FUND ($85,320). 3 of them have funded it in more than one year, and 91% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- Revenue FY2024
- $1.0M
- Funders on record
- 6
- Grants received
- $171k
- Net assets
- $3.2M
What North American Thrombosis Forum Inc D/B/A Vasculearn Network does
Programs
Clinician education programs: vln provides continuing medical education (cme) and on-demand learning resources to physicians, nurses, and pharmacists on the prevention, diagnosis, and treatment of thrombosis and cardiovascular disease. In 2024, major programs included a cme series on anticoagulation-associated bleeding and reversal strategies, as well as live symposia such as the right heart symposium in boston. These programs aim to improve clinical decision-making and patient safety by disseminating the latest evidence-based practices.
$221,000 spentPatient & caregiver support groups: vln runs ongoing peer-to-peer and expert-led support groups for patients and families affected by blood clots and related conditions. In 2024, new groups were launched, including one focused on cancer associated thrombosis (led by a hematologist and social worker) and plans for a spanish-speaking support group to expand access for diverse communities. These programs reduce isolation, improve health literacy, and empower patients to take an active role in their care.
$130,000 spentRoundtable discussions & stakeholder engagement: vln convenes expert roundtables to address gaps in clinical care and barriers to patient access. In 2024, the organization hosted two medical education and health equity roundtables with payers and clinicians to identify data needs for coverage approval of emerging therapies. This program fostered multi-stakeholder dialogue to accelerate innovation and equity in cardiovascular and cardiometabolic health.
$193,000 spentVte communication initiatives: in 2024, vln launched a vte communication toolkit for clinicians, based on research presented at the isth congress. This toolkit aims to improves patient-clinician communication at diagnosis and during the critical first 3 months of care. The toolkit is available on the vln website, www.thrombosis.org, and was also published in lancet hematology.
$68,000 spent
The 4 programs described on its FY2024 Form 990-PF.
The organization over time
Each line starts at 100 in 2017, so what you read is the shape rather than the size: 150 means half as much again as 2017, 50 means half. The number beside each label in the key is where it ended. The shaded band is where the middle 50% of its peers' revenue would sit, given their growth.
Balance sheet
Total assets and total liabilities at each year end, in dollars. The largest one-year move in total assets was 2021 to 2022, from $5.5M to $4.1M (−26%).
Leadership and staff
The officers, directors, trustees and key employees listed on each return. Joined and no longer listed compare each filing with the year before, matching people by surname and first initial; a year after a gap, or a roster under three people, has no comparison.
Chief executive
Kathryn Mikkelsen
Executive director
As listed on its FY2024 Form 990-PF.
Who funds it, year by year
2017 → 2023: the base narrowed from 2 funders to 1 funder, grant income fell $26k → $10k.
3 of 6 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 91% of grant dollars received. That money is really individual donors directing a sponsor; the institutions to cultivate are the non-DAF funders.
From the IRS filings of NORTH AMERICAN THROMBOSIS FORUM INC D/B/A VASCULEARN NETWORK’s funders (the co-funder graph). Association, not causation. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
How concentrated its funding is
NORTH AMERICAN THROMBOSIS FORUM INC D/B/A VASCULEARN NETWORK leans on a few funders — its largest provides 50% of grant income and the top three 91%; half comes from just 2 funders.
the vertical line marks half of all grant income — 2 funders to its left
99% of the income these shares are computed over arrives through pass-through sponsors or from payers whose filings do not say what kind of payment it is. Concentration is still measured over all of it, because the money is real; what it does not support is a claim about how many institutions have chosen to fund NORTH AMERICAN THROMBOSIS FORUM INC D/B/A VASCULEARN NETWORK.
Largest funder’s share by year: 2017 61% · 2018 77% · 2019 100% · 2021 37% · 2022 91% · 2023 100% — growing more concentrated.
“Effective funders” = inverse Herfindahl index (1 / Σ shareᵢ²) — the number of equal-sized funders that would give the same concentration. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Where its funders are
91% of NORTH AMERICAN THROMBOSIS FORUM INC D/B/A VASCULEARN NETWORK's grant income arrives through donor-advised or pass-through sponsors, whose addresses record where the money is held rather than where the donor is. Of the $16k that is directly attributable, 69% of it comes from funders outside Massachusetts, across 3 states.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $155k arriving through sponsors registered in 2 states is excluded from the map and the split above: a sponsor holds money on a donor’s behalf, so its registered address would place those dollars somewhere no donor need ever have been. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Against its field
NORTH AMERICAN THROMBOSIS FORUM INC D/B/A VASCULEARN NETWORK's revenue fell 17% between 2017 and 2024.
this organization peer median middle 50% of peers· 11,752 education nonprofits $1M–$10M, FY2024
Organizations like NORTH AMERICAN THROMBOSIS FORUM INC D/B/A VASCULEARN NETWORK
Organizations whose mission and program text most resemble this one, by semantic similarity over every organization in the US filings — the closest peers, and often the clearest route to shared or prospective funders.
In Massachusetts
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Screen this organization
A dated, signed PDF of the compliance screen for NORTH AMERICAN THROMBOSIS FORUM INC D/B/A VASCULEARN NETWORK: IRS status (Business Master File, Publication 78, auto-revocation), the OFAC sanctions lists, the Internal Revenue Bulletin, and California registration, with the Rev. Proc. 2018-32 §8.01 reliance elements stated element by element. Generated from the current files at the moment you download it.
Screens are triage, not determinations; a source that cannot be read reports not screened, never clear. Screen this nonprofit · How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds NORTH AMERICAN THROMBOSIS FORUM INC D/B/A VASCULEARN NETWORK?
- NORTH AMERICAN THROMBOSIS FORUM INC D/B/A VASCULEARN NETWORK (Massachusetts) receives grants from 6 organizations whose IRS filings report $171,320 to it, the largest being FIDELITY INVESTMENTS CHARITABLE GIFT FUND ($85,320). 3 of them have funded it in more than one year, and 91% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- How many funders does NORTH AMERICAN THROMBOSIS FORUM INC D/B/A VASCULEARN NETWORK have?
- IRS filings report 6 organizations giving $171,320 in grants to NORTH AMERICAN THROMBOSIS FORUM INC D/B/A VASCULEARN NETWORK, 3 of which have funded it in more than one year.
- Who is the largest funder of NORTH AMERICAN THROMBOSIS FORUM INC D/B/A VASCULEARN NETWORK?
- FIDELITY INVESTMENTS CHARITABLE GIFT FUND is the largest funder on record, with $85,320 in grants. The full list of funders is on this page.
- How can an organization like NORTH AMERICAN THROMBOSIS FORUM INC D/B/A VASCULEARN NETWORK find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Massachusetts. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2024 (financials across 2017–2024), and the filings of 6 funders that report grants to it. “On record” means captured in the filings we have parsed — a funder that does not e-file, or whose grant detail is not itemized, will not appear. Filings run roughly 12–24 months behind. Trends on this page end at FY2023, the last fiscal year that has finished arriving; later years are shown and marked, and move no figure. Data on this page was exported October 14, 2026. What this page cannot tell you · view filing