Infectious Diseases Society of America statistics at a glance
The latest Infectious Diseases Society of America statistics show an organization that is still very large, very active, and materially shaped by its conference, guidelines, and membership base. The numbers also show a society that has seen a modest membership dip in 2024 while keeping a broad governance footprint and a substantial financial base.
Fast facts
- 11,355 members in 2024 after 11,728 in 2023 and 11,202 in 2022 (IDSA IDA&E Progress Report 2024)
- 13 board members in 2024, down from 15 in 2023 and 2022 (IDSA IDA&E Progress Report 2024)
- 586 governance volunteers in 2024 after 565 in 2023 and 677 in 2022 (IDSA IDA&E Progress Report 2024)
- $33,958,465 in total revenue and support in 2024, with $41,164,247 in total expenses (IDSA 2024 audited financial statements)
- 10 guideline items in 2025 listed on the status page, after 9 in 2024 and 10 in 2023 (IDSA Practice Guideline Highlights & Status)
- 128 new FIDSA honorees in 2024 after 219 in 2023 (IDSA honors 128 distinguished physicians, scientists with FIDSA designation; IDSA honors 219 distinguished physicians, scientists with FIDSA designation)
Table of contents
- Membership and governance
- Financial data
- IDWeek and conference scale
- Guidelines and professional output
- Recognition, diversity, and membership composition
- What the numbers suggest
Membership and governance
A useful way to read Infectious Diseases Society of America statistics is to separate raw size from organizational shape. Membership is the clearest size metric, while board seats and governance volunteers show how much infrastructure is required to keep the society operating.
Big number: IDSA reported 11,355 members in 2024 (IDSA IDA&E Progress Report 2024). That is slightly below 11,728 in 2023, but still above 11,202 in 2022 and above every year from 2018 through 2021 shown in the report (IDSA IDA&E Progress Report 2024).
That pattern matters because it suggests a society that remains large even as one year of membership softening appears in the sequence. The 2024 count is still close to the same band visible in the earlier years:
- 2024: 11,355 members
- 2023: 11,728 members
- 2022: 11,202 members
- 2021: 11,169 members
- 2020: 11,383 members
- 2019: 10,706 members
- 2018: 10,754 members
That is a fairly tight range around 11,000 to 11,700 members, with 2023 as the local high point in the dataset and 2019 as the low point among the years shown (IDSA IDA&E Progress Report 2024).
Membership trend snapshot
| Year | Members | Source |
|---|---|---|
| 2024 | 11,355 | IDSA IDA&E Progress Report 2024 |
| 2023 | 11,728 | IDSA IDA&E Progress Report 2024 |
| 2022 | 11,202 | IDSA IDA&E Progress Report 2024 |
| 2021 | 11,169 | IDSA IDA&E Progress Report 2024 |
| 2020 | 11,383 | IDSA IDA&E Progress Report 2024 |
| 2019 | 10,706 | IDSA IDA&E Progress Report 2024 |
| 2018 | 10,754 | IDSA IDA&E Progress Report 2024 |
Why it matters: A membership base that stays above 11,000 across multiple years points to stable organizational reach, even if individual year-to-year swings show some churn (IDSA IDA&E Progress Report 2024).
Governance is smaller in absolute size but still substantial. IDSA had 13 board members in 2024, compared with 15 in 2023, 15 in 2022, 16 in 2021, and 15 in 2020, 2019, and 2018 (IDSA IDA&E Progress Report 2024).
That means the board was reduced in 2024 relative to the preceding three years shown in the report. In practical terms, a 13-member board can still represent a broad set of priorities, but it is leaner than the 15-to-16 member structure seen earlier.
At a glance: governance volunteers were more numerous than board members by a wide margin. IDSA reported 586 governance volunteers in 2024 versus 13 board members, which shows the society depends on a much wider volunteer network than the board alone would suggest (IDSA IDA&E Progress Report 2024).
Financial data
The financial figures add another layer to the picture. IDSA reported $33,958,465 in total revenue and support for 2024 and $41,164,247 in total expenses (IDSA 2024 audited financial statements). Those two values give a sense of the scale of activity, but they also show that expenses exceeded revenue and support in the 2024 statement.
A compact comparison helps frame the year:
| Metric | 2024 | 2023 | Source |
|---|---|---|---|
| Total revenue and support | $33,958,465 | $41,844,662 | IDSA 2024 audited financial statements |
| Total expenses | $41,164,247 | $42,268,767 | IDSA 2024 audited financial statements |
| IDWeek annual meeting revenue | $14,771,885 | $16,090,949 | IDSA 2024 audited financial statements |
| Journal revenue | $8,157,653 | $9,316,027 | IDSA 2024 audited financial statements |
| Membership revenue | $3,410,989 | $3,510,483 | IDSA 2024 audited financial statements |
| Cash and cash equivalents | $2,481,342 | $1,567,006 | IDSA 2024 audited financial statements |
| Investments | $52,332,593 | $53,169,417 | IDSA 2024 audited financial statements |
Several points stand out from the table.
First, the biggest revenue line in the dataset is IDWeek annual meeting revenue at $14,771,885 in 2024 (IDSA 2024 audited financial statements). That is the clearest indicator that the annual meeting is a major economic driver for the society.
Second, journal revenue remains large at $8,157,653 in 2024, which reinforces the role of publishing in the organization’s model (IDSA 2024 audited financial statements).
Third, membership revenue of $3,410,989 is meaningful but smaller than meeting and journal revenue, which suggests that IDSA’s financial structure is broader than dues alone (IDSA 2024 audited financial statements).
Key takeaway: the 2024 financial profile looks diversified, but not evenly distributed. Conference and publishing revenue are the dominant recurring sources in the figures provided (IDSA 2024 audited financial statements).
The balance sheet details are also useful for context. IDSA reported $2,481,342 in cash and cash equivalents at December 31, 2024, up from $1,567,006 at December 31, 2023 (IDSA 2024 audited financial statements). Investments were $52,332,593 at year-end 2024, slightly below $53,169,417 the previous year (IDSA 2024 audited financial statements).
The organization also reported $17,380,325 in total liabilities and $49,346,792 in total net assets at December 31, 2024 (IDSA 2024 audited financial statements). Put simply, the reported asset base remains substantial relative to liabilities, and the balance sheet shows a large investment position alongside modest cash on hand.
A few other 2024 line items help explain where money sits in the organization:
- $3,414,337 in accounts receivable, including journal royalties, meeting and other receivables, and amounts due from affiliates (IDSA 2024 audited financial statements)
- $4,322,565 in deferred revenue, including journal signing bonus revenue and membership dues (IDSA 2024 audited financial statements)
- $1,512,600 in property and equipment, net (IDSA 2024 audited financial statements)
- $52,541,725 in total assets and net assets at fair value, including $4,982,865 in alternative investments held at net asset value (IDSA 2024 audited financial statements)
IDWeek and conference scale
IDWeek appears repeatedly in the dataset because it is a core driver of attendance, visibility, and revenue. IDSA describes IDWeek as the joint annual meeting of IDSA, SHEA, HIVMA, and PIDS, and says it features over 100 sessions and symposia plus premeeting workshops (IDWeek About).
That matters for understanding the society beyond membership. The conference is not just a meeting venue; it is a major operational and financial engine.
Conference snapshot
- 11,921 attendees in 2023 global participation, including 10,409 scientific attendees and 1,512 virtual attendees (IDWeek exhibitor prospectus)
- 92 countries represented in 2023 (IDWeek exhibitor prospectus)
- 123 exhibitors represented in 2023 (IDWeek exhibitor prospectus)
- 75.7% domestic U.S. and Canada and 24.3% international attendance mix in 2023 (IDWeek exhibitor prospectus)
Those figures show a meeting with both scale and geographic spread. Nearly 12,000 attendees is large for a specialized medical meeting, and 92 countries means the event reaches far beyond a purely domestic audience (IDWeek exhibitor prospectus).
The attendee mix is also informative. IDWeek’s demographics chart in the exhibitor prospectus shows 50.11% clinical research, 39.95% adult ID, 9% pediatric ID, 13.04% patient care, and 6.26% internal medicine (IDWeek exhibitor prospectus). Because these categories come from the same chart, they help reveal the professional composition of the audience rather than a simple headcount alone.
Audience composition highlights
- Clinical research: 50.11% (IDWeek exhibitor prospectus)
- Adult ID: 39.95% (IDWeek exhibitor prospectus)
- Patient care: 13.04% (IDWeek exhibitor prospectus)
- Pediatric ID: 9% (IDWeek exhibitor prospectus)
- Internal medicine: 6.26% (IDWeek exhibitor prospectus)
Why it matters: this is the kind of audience mix you would expect from a conference that serves both specialty practitioners and research-heavy attendees. The ratio suggests IDWeek is built for scientific exchange as much as for bedside practice.
The prospectus also includes year-over-year attendance figures in a chart, showing 8,507 in 2021 and 9,591 in 2022, leading to the 2023 figure of 11,921 total global participation (IDWeek exhibitor prospectus). Even without adding extra interpretation, the sequence shows a clear upward movement across those years.
Guidelines and professional output
Another major part of Infectious Diseases Society of America statistics is the guideline pipeline. The status page shows 10 guideline items in 2025, 9 in 2024, and 10 in 2023 (IDSA Practice Guideline Highlights & Status).
That level of output indicates a steady cadence of guidance work, not a one-off burst. It also suggests that IDSA maintains a continuing role in clinical standards and practice updates.
Guideline activity by year
| Year | Guideline items on status page | Source |
|---|---|---|
| 2025 | 10 | IDSA Practice Guideline Highlights & Status |
| 2024 | 9 | IDSA Practice Guideline Highlights & Status |
| 2023 | 10 | IDSA Practice Guideline Highlights & Status |
The 2025 status page includes updates published in January, February, March, April, May, July, and October (IDSA Practice Guideline Highlights & Status). The 2024 page includes a COVID-19 diagnostics update in February and a primary care guidance update in October (IDSA Practice Guideline Highlights & Status). The 2023 page includes multiple COVID-19 updates and infectious-disease-specific guideline updates across February, April, May, June, September, October, and November (IDSA Practice Guideline Highlights & Status).
The pipeline is not only active in the present tense; it also points forward. The status page lists 10 guidelines in development or prioritized for development, including 2026 Q4 surgery prophylaxis, 2026 Q2 aspergillosis, and ongoing HCV guidance (IDSA Practice Guideline Highlights & Status).
That set of items is useful because it reveals what the society is planning next. In other words, the public guideline queue gives a direct view into the issues IDSA considers important enough to prioritize.
Recognition, diversity, and membership composition
Recognition programs provide another data lens on the society. IDSA and its affiliates recognized 219 new FIDSA honorees in 2023 and 128 new FIDSA honorees in 2024 (IDSA honors 219 distinguished physicians, scientists with FIDSA designation; IDSA honors 128 distinguished physicians, scientists with FIDSA designation).
That is a notable drop in the year-over-year count, but it still represents a large class of recognized experts. The 2024 figure is substantial on its own, and the 2023 figure shows that recognition programs can scale into the hundreds.
IDSA also recognized 10 outstanding experts at IDWeek 2024 and 12 outstanding experts at IDWeek 2025 (IDSA Honors Leaders in Infectious Diseases at IDWeek 2024; IDSA Honors Leaders in Infectious Diseases at IDWeek 2025). Those values are smaller than the FIDSA counts, but they show a separate layer of awards and public acknowledgment.
Composition of membership and governance
The society’s demographic and diversity data make the statistics more nuanced than a simple headcount story. In 2024, 55% of IDSA membership was male and 45% was female (IDSA IDA&E Progress Report 2024). That compares with 56% male / 44% female in 2023 and 2022, and 57% male / 43% female in 2021 and 2020 (IDSA IDA&E Progress Report 2024).
A year-by-year view makes the trend easier to read:
| Year | Male membership | Female membership | Source |
|---|---|---|---|
| 2024 | 55% | 45% | IDSA IDA&E Progress Report 2024 |
| 2023 | 56% | 44% | IDSA IDA&E Progress Report 2024 |
| 2022 | 56% | 44% | IDSA IDA&E Progress Report 2024 |
| 2021 | 57% | 43% | IDSA IDA&E Progress Report 2024 |
| 2020 | 57% | 43% | IDSA IDA&E Progress Report 2024 |
| 2019 | 59% | 41% | IDSA IDA&E Progress Report 2024 |
| 2018 | 59% | 41% | IDSA IDA&E Progress Report 2024 |
The report also shows that 62% of IDSA board members were from diverse racial or ethnic backgrounds in 2024, compared with 60% in 2023 and 59% in 2022 (IDSA IDA&E Progress Report 2024). That is a modest upward move in the board data.
For governance volunteers, the racial and ethnic breakdown is more detailed. In 2024, 61% were White, 24% Hispanic/Latino, 10% Black/African American, 5% Asian, and 0.2% American Indian/Alaska Native (IDSA IDA&E Progress Report 2024). The report shows a similar pattern in prior years, with White representation gradually declining from 67% in 2019 and 2018 to 61% in 2024 (IDSA IDA&E Progress Report 2024).
Governance volunteer diversity snapshot
- 2024: 61% White, 24% Hispanic/Latino, 10% Black/African American, 5% Asian, 0.2% American Indian/Alaska Native (IDSA IDA&E Progress Report 2024)
- 2023: 63% White, 22% Hispanic/Latino, 10% Black/African American, 5% Asian, 0% American Indian/Alaska Native (IDSA IDA&E Progress Report 2024)
- 2022: 65% White, 22% Hispanic/Latino, 9% Black/African American, 4% Asian, 0% American Indian/Alaska Native (IDSA IDA&E Progress Report 2024)
What the numbers suggest
The strongest signal in these Infectious Diseases Society of America statistics is stability at scale. Membership remains above 11,000, the annual meeting reaches nearly 12,000 participants, and the guideline pipeline stays active year after year (IDSA IDA&E Progress Report 2024; IDWeek exhibitor prospectus; IDSA Practice Guideline Highlights & Status).
A few patterns are especially clear:
- Membership is large and relatively steady, with 2024 still well above the 2018 and 2019 levels shown in the report (IDSA IDA&E Progress Report 2024)
- IDWeek is financially and operationally central, with major attendance, exhibitor, and revenue numbers attached to it (IDWeek exhibitor prospectus; IDSA 2024 audited financial statements)
- The society’s work is not just administrative; it is guideline-heavy, with a multi-year stream of published or queued items (IDSA Practice Guideline Highlights & Status)
- Governance and recognition systems are broad, which is consistent with a large professional society that depends on volunteers and honors a significant number of experts each year (IDSA IDA&E Progress Report 2024; IDSA honors 128 distinguished physicians, scientists with FIDSA designation)
If you are trying to understand IDSA through numbers alone, the cleanest shorthand is this: it is a large specialty society with stable membership, a major conference engine, an active guideline pipeline, and a wide volunteer base, all visible in the statistics supplied here (IDSA IDA&E Progress Report 2024; IDWeek exhibitor prospectus; IDSA 2024 audited financial statements; IDSA Practice Guideline Highlights & Status).