Kansas · Nonprofit
RIORDAN CLINIC INC
RIORDAN CLINIC INC (Kansas) receives grants from 9 organizations whose IRS filings report $1,440,732 to it, the largest being T ROWE PRICE PROGRAM FOR CHARITABLE GIVING INC ($1,000,000). 7 of them have funded it in more than one year, and 83% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- Revenue FY2024
- $6.7M
- Funders on record
- 9
- Grants received
- $1.4M
- Net assets
- $2.6M
What Riordan Clinic Inc does
Mission
To provide medical research and education and to serve in ways that stimulates an epidemic of health among those interested in improving their well-being.
As stated on its FY2024 Form 990.
Programs
Research: at the heart of the riordan clinic's day-to-day work and long-term vision is the riordan clinic research institute. Consisting of a small but dedicated group of scientists who are passionate about their work, the riordan clinic research institute focuses research in areas of nutritional medicine and natural therapeutics. Because of the close relationship between our research team and the physicians at the riordan clinic, we are able to target our research toward innovations that will be directly beneficial to riordan clinic patients. The rcri operates independently of special interests: it neither solicits nor accepts tax-derived funds. All of its research funding comes from private donations from individuals,corporations, and foundations. Results of the rcri's research are presented during lectures and at the conferences, published in peer- reviewed journals, and described on the clinics's website. The riordan clinic research institute works to develop nutrient-based therapies that resolve pathology without harming normal tissues. We have long been a leader in research concerning the use of vitamin c in cancer therapy, and have extensive experience in developing…
$4,026,974 spent$3,334,270 earned by the program78% of program spendingLaboratory: the on-site riordan clinic laboratory was established in 1975, originally as the bio-center lab. Our lab has dedicated itself to providing accurate clinical analysis focusing on nutritional levels. Our specialties include testing for pyrroles, histamine, cytotoxic food sensitivities, parasitology, analysis of red blood cell fatty acids and minerals, along with many vitamins. We have done exhaustive research to determine which test methodologies and specimen types will yield the most clinically significant results. We have been performing and innovating many of our specialty tests for more than 30 years. Our histamine and pyrroles tests have been offered for 38 years and are still two of the most requested reference tests we perform. In fact, we are proud to be the laboratory that many other labs choose to do their pyrroles testing. The function of our laboratory is two-fold: to provide in-house patients who come for treatment with accurate state of the art laboratory analysis and to provide diagnostic services for physicians and hospitals throughout the country. In both cases, we provide doctors relevant biochemical impairment informaton to increase diagnostic accuracy.
$1,098,496 spent$1,654,845 earned by the program21% of program spendingEducation: the riordan clinic has a variety of events from our bi-annual ivc & cancer symposiums to lunch and lectures. Our approach is one of integrative medicine, where we maximize the benefits of both orthomolecular and conventional medicine to achieve results. Since co-learners at the riordan clinic have a vested interest in the research and discovery process, they attain the ultimate form of healing: hope. The riordan clinic symposium (held bi-annually, the next is scheduled for fall 2023) explores the underlying causes of cancer, with the intent of elucidating new ways to treat the disease in a non-toxic fashion. Academy speakers represent a growing field of cancer pioneers who have found that ivc is a powerful adjunct in the care of cancer patients. Although intended for medical professionals, the lectures also serve to inform interested "cancer co- learners" who seek help for themselves and their friends and family through a better quality of life. The riordan clinic ivc academy is packed with two days of lectures, conversations, and camaraderie with other medical professionals who use high-dose vitamin c in their practices. On friday there will be multiple speakers laying…
$46,269 spent$32,812 earned by the program1% of program spending
The 3 programs described on its FY2024 Form 990, listed largest first by expense. Program spending in total: $5,171,739.
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.
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 $2.7M to $3.8M (+38%).
How it's funded, over time
Each bar is one year's revenue split into where it came from, and every bar is the same height — these are shares, not amounts, so a year that raised twice as much looks the same size. Hover a bar for the split.
Government-grant reliance: 2020 9%. Grants only. Government contracts and fees sit inside program revenue.
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 4 of the last 8 reported years ran a deficit.
reserve
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
Michael Stewart
CEO
As listed on its FY2024 Form 990.
Who funds it, year by year
2017 → 2023: the base broadened from 1 funder to 6 funders, grant income rose $5k → $99k.
4 of 9 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 83% 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 RIORDAN CLINIC INC’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
RIORDAN CLINIC INC leans on a few funders — its largest provides 69% of grant income and the top three 90%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
83% 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 RIORDAN CLINIC INC.
Largest funder’s share by year: 2017 100% · 2018 100% · 2019 91% · 2020 59% · 2021 77% · 2022 57% · 2023 76% — diversifying over time.
“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.
How long its funders stay
100% of RIORDAN CLINIC INC's funders are still giving 3 years after their first grant; 78% give in more than one year at all.
Share of funders still giving k years after their first recorded grant, pooled across every acquisition cohort. A funder counts as retained in a year only if it made a grant that year. Measured to FY2023, the last fiscal year that has finished arriving — a funder cannot be counted as lapsed in a year most filers have not reached.
Where its funders are
83% of RIORDAN CLINIC INC'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 $252k that is directly attributable, 92% of it comes from funders outside Kansas, across 4 states.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $1.2M arriving through sponsors registered in 4 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.
Organizations like RIORDAN CLINIC INC
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 Kansas
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
83% of spending goes to programs.
Governance
Public support
100%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Screen this organization
A dated, signed PDF of the compliance screen for RIORDAN CLINIC INC: 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 RIORDAN CLINIC INC?
- RIORDAN CLINIC INC (Kansas) receives grants from 9 organizations whose IRS filings report $1,440,732 to it, the largest being T ROWE PRICE PROGRAM FOR CHARITABLE GIVING INC ($1,000,000). 7 of them have funded it in more than one year, and 83% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- How many funders does RIORDAN CLINIC INC have?
- IRS filings report 9 organizations giving $1,440,732 in grants to RIORDAN CLINIC INC, 7 of which have funded it in more than one year.
- Who is the largest funder of RIORDAN CLINIC INC?
- T ROWE PRICE PROGRAM FOR CHARITABLE GIVING INC is the largest funder on record, with $1,000,000 in grants. The full list of funders is on this page.
- How can an organization like RIORDAN CLINIC INC find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Kansas. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
Play a game about who funds Riordan Clinic →
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 9 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